How To Date A Western Electric Phone

WESTERN Electrical 500-series Telephone Types Classic Rotary Telephones (Includes links to info on the 1500, 2500, 3500, Princess and Design Line serial.) �1997-2022 paul-f.com.  All rights reserved.

Updated: 27 February 2022

The 500 series was introduced in 1949 and fabricated by the Bell System until 1986.  Its pattern was licensed to ITT in 1951 and other manufacturers during the 50s, until information technology became the standard. With the afterwards addition of TouchTone, information technology evolved into the 1500 (10-button keypad), 2500 (12-button keypad), and 3500 (16-button Autovon military keypad) with similar model numbers.

	500-type Rotary	1500-blazon 10-button dial	2500-type 12-push button dial	3500-blazon sixteen-button dial

Over the years, numerous variations were fabricated with extra switches, knobs and internal components for special purposes. Model numbers well higher up the 5xx range were ultimately used.  Western catalogs and technical documentation only show the models that were in production or service at the publication engagement.  To understand the full scope of models produced we must compile data from many years of documents. This page was created as a casual attempt to answer the uncomplicated question,

"How many 500-series models did Western Electrical brand?"

The question was first posed to Antique Phone Collectors Clan (ATCA) and Phone Collectors International (TCI) members, and other dealers and collectors in early 1997.   Following are the results to engagement (no claims are fabricated equally to accuracy or abyss).

For more information, see the 60th ceremony articles on the 500-series evolution published in the TCI periodical, Singing Wires, from  January thru August, 2009.

~~ How to use this folio ~~

>> Table Organization:Sorted by  model number for the rotary variations.
>> Utilise:  Search (usually Control-F in most browsers) for the terminal three digits of the model number of your prepare.
               Or Browse by category, using the links above. Note: the Command-F search only works for models on this folio.  For Touch Tone models, use the links above to go to the appropriate page, then search.

Find the model number of your telephone on the bottom plate. In this example, wait upward 500C or 500D. (This base of operations code was shared past both models.) More on model numbers here. Vermillion ink or other codes stamped on the lesser may signal that the phone was refurbished. Watch for changed parts.

Manual Sets (sets without dials) had an "apparatus blank" filling the hole in the housing unremarkably occupied past a punch.

(Photos from Russ Cowell)

Looking up the model number for your set up should give you a cursory description of the major features of the model, and a BSP (Bell System Practices) reference for the rotary set, if known.  When bachelor, photos of some unique features are shown nigh the model number or linked from the nautical chart entry.  If you don't find your model listed, endeavour looking upwardly the last three digits in the tables for other Western Electric models.  Oftentimes the major features were consistent among rotary and Touch Tone models.

The BSPs provide technical details and ordinarily a wiring diagram.  BSPs are oft plant in the Station Service Manuals, Key Systems Service Manuals and Station Specialties Service Manuals published in the 1970s and early on 80s.  BSPs or wiring diagrams for some common models are available on several internet sites including the ATCA and TCI club sites.  Several club members accept scanned some popular BSPs and brand them available on CD.
For more details on BSPs, click here.

You still need to check the internal components as many phones were refurbed and had internal components changed or removed.  For example, many phones marked 501D were converted from party line to unmarried line (500D) by removing the 426A tube as party lines lost favor.  If done in a Bong Organization refurb facility, the code on the bottom was usually repainted or remarked.  Many independent shops or field mods were not remarked with the accurate model number.

Check out the tabular array cardinal for model numbering background and other reference details.

Basic Single LINE SETS WE500D

MODEL	MAJOR FUNCTIONS	REF	BSP
Notation: see Table Central for prefix and suffix codes and reference info.
500	Primeval 500 sets were not marked with suffix codes.  500 and date were stamped in ink, usually forth the front edge of the baseplate. w/ 425A net & amp; carve up 311A blaster.Commencement production used C2A ringer, and then C4A. Note: There were no seperate model numbers for manual and dial versions. Replaced past the 500A and 500B -- often the A/B was added to the existing 500 marking during refurb.	-	C38.595.1 Issue one: 10/58
500 A 500 B	Early single line w/ 425A net & amp; separate 311A equalizer. Model and date moved to a location near the ringer, virtually where the word �LOUD� was stamped. Run across Photo. Annotation: Bases were marked 500 A/B.  This is a manufacturing code, not the model number.  See the table key for details. Replaced by the 500C and 500D.	2,4,7,8,9	C38.595.i C38.601 Issue 1: 10/58 502-501-101 502-510-400 502-521-401
500 C 500 D	Afterward single line due west/ 425 B or E net and varistors for equalization. (No split up equalizer needed.) Replaced the 500A, 500B, 500J and 500K sets. This is by far the most popular variation and was fabricated for decades. Link to 500C Modified for Coin Line Use	two,4,7,eight,9	C38.603 502-501-101 502-510-401 502-521-402
500 Eastward 500 F	Unmarried line westward/ plunger switch to avoid interference on extensions (or party lines). Lifting the left plunger activates talk and dial circuits. Cradle is marked, �LIFT PLUNGER TO DIAL OR TALK�. Replacing the handset resets the switches.  Replaces the 302AA/AC. See photos.	2,iii,4,vii,8,ix	C32.535 C38.595.1 Outcome 1: 10/58 502-501-115 502-510-402 502-580-402
500 H	Single line w/ hooded dial lamp (GE46 bulb, 6-8v ac or dc supply, P17A120 lamp cap assembly [contact me if you have spares of this office!]), 425B network (or later 425E).  The low-cal is only activated when the handset is offhook. Cannot be used as the tip party on message charge per unit, automated  ticketing, automatic message accounting or zone restriction services.  Replaced by the 500P and U for these services. Announced in 1954. Replaced by the 500P. Historical background on the evolution from 500H to 500U is in the article "Dialing in the Dark," Singing Wires, August 2009. It shows photos of the KS 15675L1 transformer, which was originally supplied.	two,3,4,7,8,nine	C32.535 C32.537 C32.538 C32.539 C38.595.00 C38.595.one C38.607 C38.621 Issue 1: x/58 502-501-115 502-510-403 502-580-404
500 J 500 K	Single line version of the 500 (500A and 500B) w/ 425A net and a last block in place of the equalizer. Replaced the 500T.  Many 500T sets were remarked 500 J/K during refurb. Replaced past the 500C and 500D.	2,3,7,8,9	C38.595.1 C38.609 Issue one: x/58 502-501-101 502-510-404 502-521-403
500 L 500 M	Unmarried line w/ A-lead command for 1A1 or 1A2. 4- or 6-usher mounting cord, and terminal strip installed below dial.  Originally used in applications where the ringer circuit had to be brought out through the mounting string. See BSPs for variations and wiring.	2,7,8,9	C32.537 C38.595.1 C38.610 Issue 1: 10/58 502-501-115 502-510-405 502-580-405
500 P	Single line w/ hooded punch lamp (GE46 bulb, 6-8v ac or dc supply, P17A120 lamp cap assembly [contact me if y'all accept spares of this part!]), 425B network (or later 425E).  The light is just activated when the handset is offhook. Replaced the 500H to overcome limitations of that set.  Compatible with all services supported by the 500D. (Available in 1955, Md ca. 1960) Run into also the 500U, with night calorie-free feature.	2,3,iv,7,viii,ix	C32.535 C32.537 C38.595.00 C38.595.1 C38.611 Upshot 1: x/58 502-501-115 502-510-406 502-510-410 502-580-406
500 R 500 S	Single line for speakerphones, including the 1A, 1A1, 3A and 4A. 10-conductor mounting cord, internal terminal strip, actress dial and switchhook contacts and split up ringer leads for speakerphone control. See photos  (scroll to bottom of folio.)	i,2,7,eight,9	C38.595.1 C38.612 Issue 1: 10/58 502-501-115 502-580-408
500 T	Single line version of the 500 (500A and 500B) w/ 425A net and a final cake in place of the blaster. Employ was limited to zones distant from the Key Function, where the attenuating characteristics of the equalizer in the 500 set was non needed.  This was a toll saving measure out. Notation: There were no separate model numbers for transmission and dial versions. Run across Photo. Replaced by the 500J and 500K.	i	C38.595.1 Upshot i: ten/58
500 U	Single line westward/ hooded dial lamp (GE46 bulb, six-8v ac or dc supply, P17A120 lamp cap associates [contact me if you have spares of this part!]).  425B network (or later 425E). Similar to the 500P with the improver of a nighttime calorie-free switch (584A key). When switched on, the night light glows dimly when handset is on claw and at total brilliance when off hook.   See Photo. The 500H and 500P sets (to a higher place) did not have the turn switch on the lower left. Available in 1956, Physician in 1963. For more on the development of the 500 H, P and U, see "Dialing in the Dark," Singing Wires, August 2009.	2,4,vii,ix	C32.535 C32.537 C38.595.00 C38.595.i Issue one: 10/58 C38.613 502-501-115 502-510-408 502-580-409
500 W 500 Y Photo from Russ Cowell	Single line w/ neon ringing/message waiting lamp for PBX.  Available in 1958. Uses included room phones in hotels, motels and large apartment complexes, some sets had custom dial plate legends showing dialing instructions for services such as housekeeping, maintenance and local or long altitude outgoing service. Run across photo of crimson cap and mount hither.	1,2,4,seven,8,9	C38.614 502-501-115 502-580-411
500 AB	Single line for 2-wire or 4-wire circuits.  Comes wired for 2-wire service merely may exist converted at installation to iv-wire service.  Arranged for only not equipped with a KS-8109L2 Buzzer.  Intended for use in 1A1 and 1A2 Key Telephone Systems and 3B Speakerphone Systems, nonetheless information technology is intended for specially engineered lines.  Non for general telephone use. For touchtone model, encounter 2504 and 3504 .	6	502-510-411 Apparatus Catalog, 1970, p. 548
500 AD	Single line for iv-wire circuits and iii-type speakerphones.  Arranged for 4-wire service and equipped with a switch claw arrangement which provides one spare transfer and ii spare make contacts.  The spare brand contacts may be used for such purposes as controlling external relays or applying idle line excursion terminations.  Arranged for but not equipped with a KS-8109L2 Buzzer.  Intended for utilize in 1A1 and 1A2 Cardinal Telephone Systems and 3B Speakerphone Systems. For touchtone model, run into 2504 and 3504 .	2,3,seven,8,9	502-501-115 502-512-101 502-512-401 502-580-401 Appliance Catalog, 1970, p. 548
GA-51859 TA236/FT	Unmarried line with Armed services markings on case: Signal Corps U.s. Regular army, Telephone Set TA236/FT, Western Electrical. (No Bell System markings.)	TM eleven-468 US Army	-

Bones Party LINE SETS - 426A (or 425A four-element) tube for 4-political party selective ringing

For photos, see the respective sets in the table above.

MODEL	MAJOR FUNCTIONS	REF	BSP
NOTE: meet Tabular array Key for prefix and suffix codes and reference info.
501	Earliest 501 A/B sets were not marked with suffix codes. 501 and date were stamped in ink, usually along the forepart edge of the baseplate. west/ separate equalizer. Get-go production used C3A ringer, then C4A. Replaced by the 501A and 501B -- ofttimes the A/B was added to the existing 501 marking during refurb.	-	C38.595.ane Issue ane: x/58
501 A 501 B	Early party line w/ split equalizer. Replaced by the 500C and 500D.	one,2,viii,ix	502-510-400 502-521-404
501 C 501 D	Later party line w/ varistors for equalization. Replaced the 501A, 501B, 501J and 501K sets.	2,viii,9	C38.603 502-521-405 502-510-401
501 F	Party line w/ plunger switch to connect talk and dial circuits - to avoid interference with talking party.  Replaces the 306G. Run into photos.	2,seven,8,nine	C32.535 502-501-115 502-510-402 502-580-403
500 H with tube	Early party line with dial lamp gear up.  Created from a 500H by adding the 426A tube.  (For some reason manifestly not marked 501H.) Single line w/ hooded dial lamp (GE46 bulb, 6-8v ac or dc supply, P17A120 lamp cap assembly [contact me if you lot have spares of this office!]), 425B network (or later 425E).  The calorie-free is only activated when the handset is offhook. Cannot exist used as the tip political party on bulletin rate, automatic  ticketing, automatic bulletin accounting or zone restriction services.  Replaced by the 501P for these services.		C38.607 C38.621
501 J 501 Thousand	Party line w/ 425A net westward/o equalizer. Replaced the 501T.  Many 501T sets were remarked 501 J/G during refurb. Replaced by the 501 C and 501D.	ii,3,eight,9	C38.609 502-521-406
501 P	Political party line w/ punch lamp. Replaced the 500H with tube.	2,iv,7,8,nine	C38.611 502-501-115 502-510-406 502-580-407
501 T	Early Party line w/ 425A net, no equalizer, only concluding block for handset leads. Use was limited to zones distant from the Key Office, where the attenuating characteristics of the equalizer in the 501 set was non needed.  This was a price saving mensurate. Replaced by the 501J and 501K.	-	C38.595.00 502-510-410
501 U	Party line w/ dial lamp and night light switch	2,3,7,8,9	C38.613 502-501-115 502-510-408 502-580-410

OTHER ROTARY VARIATIONS WE 532

MODEL	MAJOR FUNCTIONS	REF	BSP
Annotation: run into Table Key for prefix and suffix codes and reference info.
502 A 502 B	Exclusion Single line w/ extension set exclusion and A-atomic number 82 control for 1A2 (Pulling upward on the exclusion plunger [white] operates a switch which tin can exist used for several functions, including cut off other extensions on the line for privacy.)	2,four,8,nine	C32.540 C38.595 C38.595.02 C38.628 502-515-100 502-515-400 502-531-401
503 B 503 C	Information Single line used with Information-Phone equipment, with exclusion central.	one	C38.595.02 C38.620 502-501-120 503-516-100 503-516-401
507 A 507 B	Long loop Single line w/ 419A diode, 425C net and 151C or 151F stock-still gain amp Meet photos.	3,seven	C38.595.1 Result one: 10/58 C38.595.05 C38.636 502-501-116 502-520-100 502-520-400
509 A 509 B	Long loop Political party line westward/ 426A gas tube, 419A diode, 425C net and 151C or 151F fixed gain amp See photos.	iii,7	C38.595.1 Issue 1: x/58 C38.595.05 C38.636 502-501-116 502-520-100 502-520-400
510 A 510 B	Two line due west/ signal key, 4-conductor mounting cord	2,4,viii,ix	C32.540 C38.595 C38.595.02 C38.628 502-515-100 502-515-400 502-531-402 C38.595
510 E 510 F	Two line due west/ indicate key, six-conductor mounting cord    Encounter Photograph. Also used on early PBX systems with the switch wired to provide �footing start� during power failures.	two,8,9	C32.540 C38.595 C38.595.02 C38.628 502-515-100 502-515-400 502-531-402 C38.595
511 A 511 B	Two line w/ extension set exclusion and signal key	2,4,8,9	C32.540 C38.595 C38.595.02 C38.628 502-515-100 502-515-400 502-531-403 C38.595
511 C 511 D	Ii line westward/ extension set exclusion, signal key and speakerphone	ii,eight,9	C32.540 C38.595 C38.595.02 C38.628 502-515-100 502-515-400 502-531-404
511 F	Two line w/ extension prepare exclusion, speakerphone and A-lead control for 1A2, spade tip string	two,8,9	C32.540 500-124-180 502-531-405
511 H	Ii line w/ extension set exclusion, speakerphone and A-atomic number 82 control for 1A2, D50 connector	2,8,9	C32.540 502-515-100 502-531-405
511 X30A	Voice Coupling using 30A Vocalism Coupler. Provides two-wire connection of client-provided voice transmitting and/or receiving equipment to Bell lines, DC isolation and limits excessive line signal. Has a standard �� phone plug on the correct side. Connection is made past operating the exclusion key.	-	502-501-901SW
512	With key for Secretarial exclusion See WE Secretarial Sets.	-	511 modifications 502-515-400 (Outcome 5 Fig 7)
513 B	Early Data-Telephone w/test key and lamp.  Mounting string plugs into the J1D401F information fix.  Exclusion fundamental (left plunger) transfers set between voice and information modes.  Lamp illuminates when test style is operating. D10N mounting string.	four	C38.595 C38.595.07 C38.627 502-501-120 503-516-100 503-516-402
514 B	Headset Jack Single line with headset jack in dorsum and headset mode/call back switch above right of dial.  Ringer loudness control on left side backside handset cord cutout. Bulletin waiting lamp optional with D-17998 kit of parts. See Photos. Bachelor starting in 1965.	2,7,viii,9	502-501-115 502-520-101 502-520-401 502-580-412
515 B	Two line w/ betoken key and agree button, half dozen-conductor mounting cord	1,2,iv,8	502-515-105 502-515-405    Issue 1: 4/66 502-531-406    Effect 1: 12/69
516 B	Unmarried line due west/ "make-busy" turnkey and indicator lamp (for PBX, 802A hotel)	2	502-580-463
520 A 520 B	"Explosive atmosphere" Unmarried line due west/ industrial circular wall enclosure.  G11A or C handset. Run into photos	ii,5	C38.595 502-415-100 502-415-203
522	�Elevator� phone. Mounted on a panel with the handset recessed. (Northern Electrical.  Oasis't found a reference for a Western Electric set even so.)	-	-
525 A 525 B	Weatherproof housing for outdoor utilise, complete.   Based on 325 set design. Uses optional KS-8028 lock with skeleton key. Encounter photos Annotation: The same housing is also used for the 695-type subset, which has just a handset, switchhook and last strip within.  See 502-201-102.	2,9	C38.821 502-501-117 502-560-100 502-560-201 502-560-400 502-580-437
526 A 526 B	Weatherproof housing for outdoor use, sold as components. Besides marked with a "Faceplate Code Number" of 253A or 253B with variation sub-codes. (subsequently design than 525)	2,4,8,9	502-501-117 502-580-438
529 A 529 B	No network, 12 conductor cord for 101- and 102-key equipment. Bachelor in black only. Replaced 329C prepare. D12H-03 cord, 9P-03 dial, H1A ringer, G3AR-03 handset. Optional: KS-8109L2 buzzer, 152A capacitor, 61A filter.	-	502-560-109
532 A 532 B	Impaired Hearing Single line w/ receiver amplification and volume control. 151A amplifier, 419A varistor, and P13A693 potentiometer. See Photo.	three,7	C38.595.1 Issue 1: ten/58 C38.595.05 C38.629 502-501-116 502-520-100 502-520-402
533 A 533 B	Impaired Hearing Political party line west/ receiver distension and volume control. 151B amplifier, 419A varistor, and P13A693 potentiometer.	3,7	C38.595.i Upshot 1: ten/58 C38.595.05 C38.629 502-501-116 502-520-100 502-520-402
535 A 535 B	Noisy Locations Unmarried line west/ receiver amplification and push-to-heed push button (G2 or G5 handset). It provides express receiver distension and limited reduction of transmitter and sidetone levels with the handset push-to-mind button normal. 151B amplifier, 419A varistor, P13A693 potentiometer, P-10C610 terminal block.	seven	C38.595.one Upshot 1: 10/58 C38.595.05 C38.633 502-501-116 502-520-100 502-520-404
536 A 536 B	Single line w/ speech distension. Useful for whispered confidential conversations. 151B amplifier, 419A varistor, P13A693 potentiometer, P-10C652 last block and 266A inductor.	3,7	C38.595.1 Issue i: x/58 C38.595.05 C38.635 502-501-116 502-520-100 502-520-406
537A	Rotary dial telephone eastward/due west G5U handset, affluent mount loudspeaker, battery exam button, RCVR VOL pushbutton, emergency push button.  12V dry cell battery for three months of boilerplate use. Mechanically rugged, portable, corrosion resistant, "sealed confronting 100-percent humidity and forceblown rock dust." (!!)  Operates at -18 to 60 degrees C (0 - 140F).  Meets requirements for "Intrinsic Prophylactic" in Mineral Resource, Title 30, Part 23 (Telephone and Signaling Devices), UL Standard 913 and National Fire Protection Association 493. Approx. 18.58 in x 14.04 x 9.56.  28 Pounds. Initial Use: No. 1A Industrial Communication System Comcode: 103 222 592		WE Card Index 5/29/81 Plant by Rick Walsh
540 - series	Run into Key Sets	-	-
55x are all wall sets 552	Single line wall w/ exclusion plunger on summit.	7	500-124-180
554 A 554 B	Single line wall. Announced in 1955 in black and ivory.         554 Modified for "Lift Plunger to Talk or Dial."	2,four,7,eight,ix	C32.559  Outcome ane: 2/55 C32.560 C38.595.1 C38.637 502-501-101 502-521-410 502-510-410
554 F	Single line wall equipped with 9 human foot handset cord.	2,four,7,8,9	502-501-101 502-521-410 502-510-410
555 B	Two line wall w/ signal central and concur button	ii,8,9	502-515-415 502-531-407
556 A 556 B	Party line wall	2,7,viii,9	C32.559  Issue one: 2/55 C32.560 C38.595.one C38.637 502-501-101 502-521-411 502-510-410
557 A 557 B	Long loop Unmarried line wall due west/ 419A diode, 425C net and 151C or 151F fixed gain amp	7	C38.595.05 502-501-116 502-520-100 502-520-400
558 A 558 B	Two line wall w/ signal key. Above: Modified 558 with amplifier added. Functions like the 532 desk set higher up (click hither). For details, see these articles in TCI's Singing Wires: July 2009 -- Can Yous Hear Me Now? Apr 2018 -- WE 565 Equipped for Speech Amplification	2,4,8	C32.559  Issue i: 2/55 C32.560 C38.638 502-515-100 502-515-401 502-531-408 C38.595
558 C 558 D	Two line wall w/ betoken cardinal, exclusion and control leads	2,7,8,9	502-501-116 502-515-100 502-531-409 C38.595 C38.595.02
558 F	Two line wall w/ signal central, control leads and A-lead control for 1A2. See photos	2,9	502-515-100 502-531-410
559 A 559 B	Long loop Political party line wall w/ 419A diode, 425C net and 151C or 151F fixed gain amp	7	C38.595.05 502-520-100 502-520-400
560 - series	Encounter Key_Sets	-	-
570 Photos from John Corley	Big roadside "Emergency Reporting" or "Fire" gear up, manual only, Usually painted bright ruby-red or yellow. Cover removed to show internal components.	8,9	C38.813 C56.112 502-550-100 502-580-455
575	Come across Key_Sets	-	-
581 A	Internals for customer-supplied housing and handset. (Likewise used in design-line phones.) Replaced F-55659 and F-56660. See photos.	ii,8,ix	503-100-120 Issue i: 10/70
591 A 591 B	Desk prepare supplied to operating company with no Bong System markings or ringer -- for installation of a frequency selective ringer for party line utilize. See photos	-	No BSP - see 500D Connection Diagram in box
592	Unmarried line prepare with internal speakerphone microphone and controls -- used with 1A and 1A1 Speakerphone systems. See details and photos Announced in 1954.	four	C70.201.00 C70.201.01 C70.201.03 512-610-100 512-610-101 512-610-200 512-610-400
593	Wall set up sold to independents without a ringer, marked "Western Electric" Run into photos	10	No BSP - see 554 Connection Diagram in box
596 Due east	"This is a desk type manual telephone gear up intended for use in the Command Post Alerting Network (COPAN)." Available just in yellow (-56) and low-cal gray (-61)".  Manual set up, 2 or four wire, manual four-footstep ringer book control, neon lamp equipped, ringer supplement, push to talk handset.  Consists of: PTT handset (G5RR), hookswitch, C4A ringer, hook switch, dial blank, neon lamp and domed lens (in position of message waiting lamp on 500W/Y), 10 conductor mounting cord, no network. The round number carte in the dial blank says: "JCS ALERT Net/Emergency Apply Just" (Joint Chiefs of Staff)	-	C38.595.01 529-205-148
597 AR	"Used in the (SAC) Strategic Air Command secondary and master alerting systems." Desk manual set. Bachelor in red (-53) only. The set has no ringer or network.  But a handset (G3BR), hookswitch, final strip, punch bare, and a 6-usher line cord.  Used with 4-wire circuits.	-	502-536-100 529-205-110
660 - serial	See Automatic Dialers	-	-
750 - series	Come across Panel Phones	-	-

ROTARY KEY SETS Nosotros 544

MODEL	MAJOR FUNCTIONS	REF	BSP
NOTE: see Table Primal for prefix and suffix codes and reference info.
540	four-button,  non-lighted buttons B: H P P P, fourteen-conductor line cord  (Note: Button codes for all key systems descriptions: H = hold, non-locking P = pickup, locking Southward = signalling, non-locking      PS = pickup, locking, convertible to signalling, non-locking C = cutoff, turn button) 500-series keysets announced in 1955.	-	502-525-200 502-525-300 502-525-400 502-541-401 C32.558 C32.561 C38.595 C38.595.3
541	4-push, not-lighted buttons and exclusion,  14-conductor line cord	7	500-124-180
543	4-button, single line, specific to a 761A PBX Designed for the small hotel/motel market, used in the guest rooms.  Control buttons and "A-leads" (command leads) tell the switching equipment what kind of line to connect to the set (switching done inside the PBX). 4 buttons marked "Message waiting" (the front desk could illuminate it to alarm you to a message), "Desk-bound" (connected you to the front end desk-bound), "Local" (connected yous to a CO torso for a local phone call), and "Long distance" (gave yous a direct path to a price operator).  Only iii of the 4 buttons depressed.   These button features relieved the attendant of having to road much of the guest traffic. Outwardly, these sets look similar a 544 or 545 set just have fewer line cord conductors (12). 543DB � 641A line key, C4B ringer 543DBC � 588B line fundamental, C4A ringer � field/distributor converted from 544BB or 545BB. Encounter photos	-	502-522-100 502-522-400 502-580-431
544	4-push, lighted buttons. Meet photos A: P P P PS, 25-usher line string  B: H P P PS, 19-usher line cord	-	C32.558 C32.561 502-525-101 502-541-402
545 B 545 Grand	4-push, lighted buttons and exclusion. B: H P P PS, 24-conductor line cord (GBR)	seven	500-124-180 502-525-101 502-541-403
561	6-button, not-lighted buttons and exclusion. 25-pair line cord.	-	C38.595 C38.595.3 502-525-200 502-525-300 502-525-400
563	half-dozen-push, headset connection.  25-pair line cord.	7	500-124-180 502-525-102 502-525-403 502-541-404
564	half dozen-button, lighted buttons  B: H P P P P P, 28-usher line cord C: H P P P P S, 25-conductor line cord  D: H P P P S S, 25-usher line string Hard disk drive: thirty or 34 usher line cord.   No lamp for Concur key. HK/HL:  30 conductor line cord.  No lamp for HOLD cardinal. F-53149: 564HB modified with plug-ended mounting string.	-	C32.558 C32.561 502-525-102 502-525-404 502-525-410 502-541-406 502-541-407 C38.595.04
565	6-button, lighted buttons and exclusion  A: P P P PS PS PS, 34-conductor line cord  B: H P P PS PS PS, 34-conductor line cord  E: H P P P PS C, 31-conductor line string Subsequently sets with speakerphone and 25-pair line cord:  GA, GB, GK (vi-line pickup)  HA, HB, Hard disk drive, HK (5-line+concord)  LA, LB, LD, LK (concord,four-line pickup,cutoff)      (Lamp for HOLD fundamental except on �K sets.) There was a modificatied 565 with speech amplifier added. Functions like the 532 desk gear up to a higher place (click here). For details, see these manufactures in TCI's Singing Wires: July 2009 -- Can Y'all Hear Me Now? April 2018 -- WE 565 Equipped for Speech Distension	7	C32.558 C32.561 500-124-180 502-525-103 502-525-405 502-525-406 502-525-408 502-525-409 502-525-411 502-541-410 502-541-414 502-541-415 502-541-416
566	vi-button, used with 755A PBX May be adapted to 750A PBX. Only one fix of Tip and Band become to the set, equally line switching was done in the PBX. FB, MB (wired for 1A speakerphone and busy lamp), MD	-	C38.851 502-525-103 502-529-400 502-541-419
567 PB	6-button Data Aux Set Used to control the 103A and other early modems (buttons: data, talk, test1, test2, local, auto)	seven	500-124-180 502-501-122 502-534-100 502-541-429
568 H	6-button w/ exclusion (HB,HF,60 minutes,HT)  2 or four-wire performance (P25E963 relay associates). HB has circular buttons on the key strip and metal fingerwheel. HF replaced HB and has H1A ringer. HR replaced the HF and has N1A ringer with side-mounted volume control and case markings for LOUD and OFF, and a clear fingerwheel. Room for optional AC or DC operated buzzer. Available in blackness, red and white.	7	C38.595 C38.642 C38.642.00 500-124-180 502-532-100 502-532-400 502-532-407 502-541-420 502-541-420 502-541-420 502-541-423 CD/SD-69425
568 HT	Early on touchtone keyset (before 1500 numbering), relay for 2 or 4-wire operation. Has 22-type dial with P (Priority) and SG (Special Grade) buttons,  and circular line and hold buttons on key strip.  Has foursquare buttons on fundamental pad. Bachelor in black simply. (Come across photos.) 1568HT replaced it. 568HB,HF,HR is the rotaty version. 2568HAA is a later 12-push touchtone model.	7	C38.595.06 500-124-180 500-542-406 502-503-410 502-532-100 502-532-400 502-546-406 C71.835.00 CD/SD-69423 22-type Dial: C18.006.00 501-164-102
569 NB	Data Service 6 Buttons: data hold, talk, examination, 1st pickup, 2d pickup, automobile answer or tertiary pickup	7	C38.643 500-124-180 502-501-122 502-533-100 502-541-430
575 AM	vi-button keyset for Comkey arrangement intercom-only stations Comkey 718, 734, 1434 and 2152. Red non-performance key may exist used for message waiting, 3 intercom line keys and 2 unused keys.	-	503-603-120 518-450-110 Event ane:  1976
(CLICK IMAGE FOR LARGER VIEW)	This department contains Call Director sets, which were introduced in 1958, and "Call Director-type" telephone sets and consoles made from similar components and independent in related BSPs. Similar impact tone sets can be constitute on the 1500-, 2500- and 3500-serial pages: 1500-series CallDirector 2500-series CallDirector 3500-series (AUTOVON) CallDirector
600 (CLICK IMAGE FOR LARGER VIEW) 601 (CLICK Epitome FOR LARGER VIEW)	Call Directors , General Purpose    eighteen-push    thirty-push button D1A Ringer (adjustment on front left of ready), 6L punch. For 1A1 and 6A Key Telephone Systems, Non 1A. Telephone call Directors announced in 1958. Replaced by the 630-series.	-	C38.650 Issue 1: 1958 C38.653 502-630-101
608	Call Director 2 or 4-wire 30-button 608C with headset jack, Flash and Release keys. For 1A1 or 1A2 Cardinal Telephone Systems.	-	C38.655 500-124-180 502-608-100 502-608-400
609 (CLICK Prototype FOR LARGER VIEW)	Call Director, used at supervisor desk with a dial TWX or WADS No. 6A teletypewriter switchboard. Moss green (-51). 589G keys (iv) plus 617A Key.	-	502-609-101 502-609-401
616 (CLICK IMAGE FOR LARGER VIEW)	Telephone call Director, 18-button, used with Switched Circuit Automatic Network (Scan). 2- or 4-wire circuits, 1A1 or 1A2.  Flash and Release keys. Moss green (-51). 22B TouchTone dial with P and SG keys (like the 568HT above.). Replaced by (renumbered to) the 1616 shown here.	-	C38.658 502-616-120 502-616-401
617	Call Director, 30-button, used in FAA installations. two- or 4-wire circuits. Light Gray (-61).	-	C38.658 502-616-101 502-616-402
618	Call Director, 2 or 4-wire service.    18-button Headset jack, Flash and Release keys. For 1A1 or 1A2 Fundamental Telephone Systems.	-	C38.655 500-124-180 502-608-100 502-608-400
619	Used with 5A Declaration Systems	-	Nosotros Tel.Prod HB, 1975 201-511-101 201-511-301 201-511-501
621	Used by 701B PBX attendant.	-	C38.656 502-620-400
622	Used in No. 5 crossbar systems arranged for customer group service.	-	C38.656 502-620-401
623	Used with Chief Command Center of Electronic Switching System Offices. Lite Gray (-61).  eighteen-button.	-	502-623-100 (Issue one: 9/64) (Restricted Distribution) We Tel.Prod HB, 1975
624	Used with the recorded declaration frame of the No. ane Electronic Switching System (ESS).	-	We Tel.Prod HB, 1975
625 (CLICK Epitome FOR LARGER VIEW)	Call Director, used with the 110A key phone organization. No dial. Moss green (-51). Turnkeys for battery and buzzer.  G5 push-to-talk handset.	-	500-124-180 502-625-100
630 631 630-type with Speakerphone (Photo from John Decker)	General purpose Call Director 18-button    30-button Replaced 600A and 601A. Uses "even count" color codes. For 1A, 1A1 and 6A Key Telephone Systems.	-	C38.651 502-600-100 502-600-101 502-600-301 502-610-406 502-630-100 502-630-101 502-630-200 502-630-401 502-630-402
632	Call Director for "limited utilize" eighteen-button Replaced 600B. For 1A1, 1A2 and 6A Key Telephone Systems, NOT 1A.	-	502-600-100 502-600-101 502-600-301 502-630-101 502-630-402
634 (CLICK Epitome FOR LARGER VIEW) 635 (CLICK IMAGE FOR LARGER VIEW)	Call Directors used with station line concentrators    18-button 30-button Replaced 600C and 601C. Uses "even count" color codes. For 1A, 1A1 and 6A Key Telephone Systems.	-	C38.650 C38.651 502-600-100 502-600-101 502-600-301 502-610-409 502-634-101 502-634-401
636 637 Looks like this 683 set Photo from Dave Friedman	General purpose Call Directors with headset jack    18-button thirty-button Flash and Release keys above dial. 151D amplifier. Uses "even count" colour codes. For 1A, 1A1, 1A2 and 6A Key Phone Systems.	-	C38.650 C38.651 502-600-100 502-600-101 502-600-301 502-610-418 502-636-101 502-636-111 502-636-401
638 (CLICK IMAGE FOR LARGER VIEW) 639 (CLICK IMAGE FOR LARGER VIEW)	Call Directors with headset jack used with station line concentrators    18-push button 30-button Flash and Release keys above dial. 151D amplifier. Uses "even count" color codes. For 1A1, 1A2 and 6A Key Telephone Systems.	-	C38.651 500-124-180 502-600-100 502-600-301 502-636-101 502-636-111 502-636-402
643	Call Director, used in the 11A Alerting System.	-	We Tel.Prod HB, 1975
66x	See Automatic Dialers	-	-
680 681	Call Managing director, "Non for full general telephone use. Shall not exist used unless specified by service order."    18-button    thirty-button	-	WE Tel.Prod HB, 1975
682 683 Photo from Dave Friedman	Call Director, for 2- or 4-wire operation.    18-push    30-push	-	We Tel.Prod HB, 1975
691A	Subset used with data set 101A in Models 14, 15 and 19 teletypewriters. 6-push keyset. Has no hookswitch or transmitter element � uses 732A receiver (which looks similar a G3 handset with no holes in the transmitter cap!). Keys marked ANS/CLEAR/ORIG/ /TEST/LOCAL. First 4 are momentary, last 2 lock. 425F network, 7L punch with numbers-only plate, C4A ringer and 589S Key. Bottom plate marked, �SUB Set 691A�.See photos.	-	C38.061.01 (Effect 1: 12/62) 502-200-101 502-200-300 972-100-100
750 - series	Encounter Panel Phones	-	-
830 We 830FM	10-button desk set 830DM and FM include an extra push button for remember.	-	503-701-101
831 We 831CM	20-push desk-bound fix	-	503-702-101
832	x, 11 or thirteen- push button keysets used in Comkey 718 and 2152 systems (run into BSPs) 11-button sets have Concur, 7 line pickup, two intercom lines and Recall. 13-button sets add Privacy Release and Ring Transfer Variations for both desk and wall mounting.	-	503-701-110 518-450-110
833	20-button keysets used in Comkey 718 and 2152 systems (come across BSPs) Hold, 14 line pickup, 3 intercom lines, RECALL and Privacy Release -OR- Ring Transfer. Variations for both desk and wall mounting.	-	503-702-110 518-450-110
835 836	x-push button keysets, Comkey 416 Primary station with power supply and logic.  (see BSPs) 10 fundamental Direct Station Select field.  (Replaced past 981 sets)	-	518-450-105 518-450-106
837	10-button keysets, Comkey 416 Satellite station without power supply and logic.  (come across BSPs) 10 key Direct Station Select field.  (Replaced by 981 sets)	-	518-450-105 518-450-106
851	6-push button wall set	-	503-601-101
852	10-button wall set up	-	503-701-102
981	ten-button keysets, Comkey 416, 4A Communication Organization Master (981A01) and Satellite stations (981A02 desk, 981A03 wall).  (see BSPs) 10 key Direct Station Select field.	-	518-450-105 518-450-106
983	10-push keysets, Comkey 416, 4A Communication System Satellite stations with BIS (built-in speakerphone, 983A01), or HFAI (Hands-complimentary answer intercom, 983A02).  (see BSPs) ten key Direct Station Select field.	-	518-450-105 518-450-106

ROTARY Automated DIALERS We 661

MODEL	MAJOR FUNCTIONS	REF	BSP
Annotation: see Tabular array Central for prefix and suffix codes and reference info.
660	Automatic Dialer - Uses plastic cards to store phone numbers to be automatically dialed. A lead control. Requires a depression voltage external power supply for operation. See Card Photos. Card dialers announced in 1961.	-	502-617-400 502-660-100 502-660-101 502-660-120 502-660-400
661	Keyset, 6-button Automated Dialer - 40A dial, G1A ringer. 40A punch is polarity sensitive and operates from line current. No external power supply is needed.	-	C38.665 (Issue 2: 4/61)502-661-101
662	Keyset, 6-button Automatic Dialer - 41A dial, optional exclusion feature, wired for speakerphone apply.  "Speakerphone and exclusion cannot exist provided at the same time because of insufficient mounting cord conductors" (C38.666.00, I1) 41A punch is not polarity sensitive and requires a depression voltage ability supply that delivers 12.5-nineteen vac to the dial.	-	C38.666.00   (Result i: one/63)502-617-402 502-660-102 502-660-402 502-662-100 502-662-120
663	Automatic Dialer - wired for headset use, has 242-blazon amp, jack on the left side and turnswitch for ON/OFF control. Requires a low voltage external power supply for operation.	-	502-617-403 502-660-101 502-660-120 502-660-403
664	Keyset, six-button Automated Dialer -  wired for headset use, has 242-type amp, jack on the left side and turnswitch for ON/OFF control. Requires a low voltage external power supply for functioning.	-	500-124-180 502-660-102 502-660-404 502-662-120
665	Automatic Dialer for ii or iv-wire service. Requires a low voltage external power supply for operation.	-	500-124-180 502-662-120

ROTARY PANEL PHONES We 750B

MODEL	MAJOR FUNCTIONS	REF	BSP
NOTE: come across Table Central for prefix and suffix codes and reference info.
750 A 750 B	Single line panel phone. Mounted in a metal box recessed into the wall. Used on CO or PBX lines. Grill on forepart for ringer and knob for ringer adjustment.	7	C38.680 502-705-100 502-730-401 502-750-100 502-750-300 502-750-400
751A 751 B	ii-line panel telephone with exclusion. Used on CO or PBX lines.	vii	502-733-401 502-750-100 502-750-401
751C 751 D	2-line panel phone with exclusion. Used on CO, PBX, 1A1 or 1A2 KTS lines. This set modified for utilize with Secretarial Service	7	502-705-101 502-750-100 502-750-401
752	Panel telephone with 3-type speakerphone.	-	502-705-102 502-736-401 502-750-102 502-750-402
753 A 753 B	2-line console phone with concur	8	502-705-103 502-739-401 502-750-103 502-750-403
754	6-button keyset panel phone	-	502-705-102 502-736-402 502-750-104 502-750-404
755 Photo from Jeremy Walters	Armored, with armored cord (similar a pay telephone).  Used in lobbies to communicate with tenants.	-	502-750-105 502-750-405

Primal:

MODEL Number Format = 5nnv,      where 5nn=model number, and v indicates model variations.
due east.g. 500D

Many bases are marked on the bottom 5nn x/y (e.grand. 500 C/D).  This was a manufacturing convenience used where the aforementioned base component was used to build several different variations and is not the model number.  Unremarkably x=transmission version (no punch) and y=with dial.  Model number 500C has an apparatus blank instead of a dial.  Model number 500D has a dial. There are exceptions.  The 500 P/U base was used to make the 500P or 500U sets, both of which have dials.  Some bases are marked 500 P, some 500 U and some 500 P/U.

� Many TouchTone models have similar numbers, with a prefix of 1, 2 or 3,  e.m. 15nn x/y.
         (See the advisable site page for touch tone models.  Links at the acme of this page.)

� Prefix codes:
1: TouchTone models, 10-button keypad  (digits 0-nine),  e.g. 1500D, announced 1964, Doc 2/68;
two: TouchTone models, 12-button keypad  (digits 0-nine, * and #), e.g. 2500D, phased in during 1968;

  3: Autovon models, 16-button keypad  (adds FO, F, I and P keys), e.thou. 3504B, appear 1969;

CS: later on models (1980s) which were customer-owned (including internal components),  e.m. CS2500.

� Suffix codes (Note: multiple suffix codes may exist used on one gear up):

M	Grandodular handset and line connectors, e.g. 500DM - 500D, Modular. 1M or 2M suffix indicated bases that were inventoried as components, separately from the colour parts such as the housing and handset.  This was washed to economize on the size and weight of sets carried in the installers' trucks. e.one thousand. 500D2M - Modular 500 base Planned daily installations were stocked in the truck as fully assembled sets (e.thou. 500DM).  The installer could assemble a ready of the proper color for an extra extension added to the order while on site using a 500D2M plus color kit plus cords. More info in BSP 503-100-100.
G	Polarity Granduard installed  (TouchTone models), e.grand. 2750AMG - 2750A console, Modular, with Polarity Baby-sit.
P	Wall set up with modular wall plug, e.yard. 554BMP - 554B wall, Modular, with Wall Plug on dorsum of set.
R	Retractile cord (coiled handset cord), e.g. 500UR - 500U with Retractile cord. (R is non normally marked on sets.  Found in catalogs and on boxes.)	(Photo of box stop)
Due west	Without Bell Organization markings -- marked "Western Electrical" For sets sold exterior the Bell System   e.g. 500ABMW - 500AB, Modular, Without Markings. Handset handle and housing moldings eliminated any reference to the Bell System.	(Handset and housing photos from Jonathan Sowers)
-nn	Color Code, e.g. 500D-54 (chocolate-brown).  For colour list, see Colors.   east.grand. 7D-three (black) dial. Color code is rarely marked on sets.  For a curt time in the 1950s, when color was new, dials and occasionally bases had a color code.  More often establish in catalogs and on the boxes. (Come across photo of 500UR-59 above.)
*	Set wired for 1A1 or 1A2, (typically found on 500L/M or keysets), east.g. 500M*	(Photo from David Haber)

? (in table entries) = Model identified, merely characteristic clarification and reference nevertheless needed. Please help!

� Note: WE made many models based on the 500 pattern with model numbers exterior the range 500-599.

SAMPLE MODEL AND Date MARKINGS:
The markings are commonly found in the back right corner of the bottom plate -- either below or to the left of the ringer adjustment wheel.

	Ready is a 500C (no dial) (Vermillion code indicates set was refurbished.)	Set is a 500D (dial) Colour 54 = dark brown	Ready is a 500AB M = modular W = without Bong Organisation Markings	Set is a 554B CS = Customer Endemic 1000 = modular P = modular plug installed

Note: date codes on the correct two phones are in the form YYDDD, where YY is the terminal 2 digits of the yr and DDD is the numeric solar day of the twelvemonth (001-365).  Their bases are cad plated, rather than the original black.

Date codes changed format in about 1978 for 500-type sets and in near 1977 for Princess sets.

� COMPONENT EVOLUTION: Model numbers relate to "function" while components in each model changed from time to time, and were oft phased gradually into production.  For instance, in the 500D:

• Plastic housing:  Soft plastic (1949) > Hard ABS plastic (Gradually phased in between 1959 and 1964);
  
• Western Electric bakelite and soft plastic receiver caps generally have 6 holes in a circle, and transmitter caps have iii concentric circles of 6, 12 and 18 holes, for a full of 36.  Hard plastic caps each have the same pattern with the addition of ane pigsty in the eye of the pattern.  Note that caps were often changed in refurb, so are not a reliable indicator of handset plastic material.  For case, soft plastic caps are often found on bakelite handles marked G1.
• Handset: black sets: G1 bakelite (1949) > G3 plastic (phased in 1962-65) > G15 modular (~1972);
  
• Handset: colored sets: G3 plastic (1953) > G15 modular (~1972)
  
• Handset cord strain relief:  2 slice pattern (1949) > integrated with transmitter cup (~1952);
• Cords:  Hardwired (1949) > Modular connectors (~1972);
• Dial:  black sets: 7A (1949) > 7D > nine-series (~1965);
• Punch:  colored sets*: 7C (1953) > ix-series (~1965);
  
• Fingerwheel:   Black metal (1949) > Clear Plastic, "open center"* > Plastic, solid heart (~1962);
• Network:  425A (1949) > 425B (1952) > 425C > 425E > 4228 > 4293 (~1983);
• Ringer:  C2A or C3A (party line) (1949) > C4A (~1954);
• Baseplate:  Painted black (1949) > Cad plated (~1967)  [see photos above];
• Anxiety:  Leather-covered (1949) > Triangular Neoprene (1958) > Round ribbed (1963) > Round apartment (~1966);
• Hookswitch plungers:  Black (1949) > Clear * (all colored sets and with difficult plastic for black sets);
• Housing engagement code (inside):  Printed in ink along forepart border (1949) > pressed in circle near cradle (~1960);
• Handsets and bottom plates marked "Bell System Property, Non for Auction" (1968-1983).

* Changes with Colored Sets starting in 1953: 7C dial, clear hookswitch plungers, clear plastic fingerwheel.  Await for color code on the dorsum of the 7C dials,  e.g. 7C-59.  Articulate plastic fingerwheels were also used on black 500H, P and U sets.

(Many individual components take date codes.  Information technology is not uncommon to detect refurbished phones with internal components of mixed dates, as the Bell Arrangement was a principal of recycling.  I have several sets with two leather feet and ii plastic feet thanks to the refurb shop.  The real treasure is to detect an early set where all the dates match!)

� WE also made specials for large customers (e.m. Howard Johnson).

� Exclusion keys were wired for many purposes, including ringer cut-off, extension station cutoff, etc.

References include:
1. Station Service Manual (325-048), 8/eighty
two. Southern Bell Station Service Manual, V2, two/74
3. New England Phone Service Manual, 1970
four. 100 Years of Bong Telephones, Mountjoy, 1995
5. Telephone Collecting: Seven Decades of Design, Dooner, 1993
7. New England Telephone Station Installation Handbook V2, nine/lxx
viii. Bell System Station Service Manual, 8/77
9. Bell System Station Service Manual, 9/78
10. Western Electric Catalog #10

WHEN WAS MY 500-Blazon Fix BUILT? It'due south time for some detective work.  Fortunately, Western Electrical left a lot of clues for us to follow.  Virtually components of the 500-series sets had both model numbers and dates.  This was important for them, every bit the Bong System owned the phones at the fourth dimension, and refurbished the sets to extend their useful lifetime.  Near of the sets we find today were in service for many years and were probably refurbished at least one time.  Original components were replaced with the currently manufactured parts.  Therefore, internal dates of the components do not ever match.

The dates that are the nearly important in establishing historic period are the engagement on the lesser plate and the date on the network.  These 2 components were unremarkably joined in the assembly process using rivets, so were hard to change in refurb.  If the dates match, that was most probably the associates date of the phone.  Other components  used in the associates would originally have had the same month code or perhaps a appointment a calendar month or two earlier.

Look at the model number and date data advisedly, to make sure it hasn't been changed.  Frequently, original dates have been painted over and new dates stamped .

	Original date. Set is a 500C (no dial) (Vermillion code indicates set was refurbished.)	Original numbers painted out New code in vermillion ink.	Original lawmaking painted out New code in silver ink. "CONV" = converted	Simply model variation painted out Date not changed! Wait for replaced parts.

Parts such equally the dial, ringer, cords, plastic housing and all handset components unremarkably besides have dates.  These parts are real like shooting fish in a barrel to change, so were often replaced during the phone's useful lifetime.

If your phone has mixed dates,  the interesting dates for it are the dates on the base and network, and the dates of the last refurb or newest component constitute.

Another practice for the phone sleuth is to try to determine what the original model number was, if the original model number had been painted over.  Occasionally careful exam of the blackness paint will show a slight raised blueprint caused by the original ink beneath.  In other cases, remains of the previous model will be left in place.  For case, looking inside the phone from the rightmost photo above revealed a last strip near the handset entry hole.  Therefore the original gear up was probably a 500T, 500J or 500K.  The original 425A network had been removed and replaced with a 425B.  The last strip was left in place.

Phones stamped "CONV" usually had the network replaced.  The conversion was from the 425A to 425B.

COLORS:

Now that y'all know how many models you need to collect, try finding them in all the following colors, by year!!

The color code was appended to the model number as a suffix.  Dates offered are included, where known.  To view 1983 Western Electric Color Charts, follow these links:  For Phones , or For Components .  (Thanks to Todd Bernstein and David Massey for providing these charts!)

Keychains in "original" colors

Nosotros 500 Colors: 1949 thru 1983 Annotation: The outset color name is typically the one found in the initial BSPs.  Other names were used in marketing literature and often differed amidst the Operating Companies. Note: Dates are based on commencement appearance in marketing literature. Sets may be plant dated the previous year. -3 Black -29 Transparent (dates unknown) New in 1953 (Black handset, dial & cord) -fifty Ivory, Cameo Ivory, Archetype Ivory. -51 Green, Moss Green, Mistletoe Green, Sage Greenish,  Colonial Light-green. -52 Grey, Nighttime Gray, Oxford Greyness, Charcoal Gray, Dove Gray. (Medico* 1957) -53 Blood-red, Cherry Red, Cardinal Reddish, Fiesta Carmine. New in 1954 (full color or two-tone) -54 Brown, Mahogany Brown, Briar Chocolate-brown, Autumn Brownish. (MD 1957, connected for keysets for several years) -55 Biscuit, Dark Beige, Rose Biscuit, Rosewood Beige. (MD 1957) -56 Yellow, Canary Yellow, Sunlight Yellow, Pastel Yellow. -57 Blueish, Medium Blue, Dark Blueish, Mediterranean Blue, True Blue, Capri Blue, Shadow Blue. (MD 1957) New in 1957 (two-tone Md) -58 White -59 Rose Pink  (MD ca. 1978) -60 Light Beige -61 Light Grey    (MD ca. 1978) -62 Aqua Blue New in 1964 -64 Turquoise   (Dr. ca. 1978) *Doctor = Manufacture Discontiued

Late Product (80s) -93 Lemon Xanthous -104 Chocolate Dark-brown -105 Dark Green, Hunter Green -106 Lime Green -115 Royal Blue, Dark Blue -123 Butter Yellow -124 Rust (& Merlin) Gun Metal Greyness (Oxford) Peach Salmon For more than information on phone colors, see: Phones in Color! WE Color Codes Chart

HANDSETS: WE G3

How simple could it exist?  Although we usually find the G1, G3 and G15 versions, wait at all the others out at that place...

Notation that there are several model numbers within each blazon code, based on string blazon and in some cases controls provided.  Some information is presented in the chart, but see the BSPs for details.

MODEL Type	Clarification	BSP
G1	Early standard handset - Bakelite Housing and Caps, Black. Many were subsequently refurbed with plastic caps (which are oft hard to remove!)   Replaced by G3. Some G1 handles were used to make GF handsets.  Run into GF below. Models include: G1AR (500 sets), G1DR (PBX), G1FR (570-type sets), G1G (coin collectors), G1J (525A and B sets).   G1B had an optional weight (RS-9099) for use with 190 series and lower money collectors.	C63.341 501-210-102 501-210-300
G2	Early on push-to-talk/listen.  Replaced by G5.	C63.341 501-210-102 501-210-300
G3 G3W photo (no Bell System markings) from Jonathan Sowers	Later standard handset - Plastic Housing and Caps. Available in colors. Replaced past G15 (modular). Some G3 handles were used to brand GF handsets.  Run across GF below. Models include: G3AA (525A and B sets), G3AB (PBX), G3AC (570-blazon sets), G3AR (5,half-dozen,700-series sets), G3BR (COPAN - Command Post Alerting Network), G3CR,DR (601-type, 700 series), G3FR (112A cardinal equipment), G3K (coin collector, 750-type), G3L (primal mountings), G3M,P,R,S,T (coin collectors), G3Y (2568HP)	C63.341 501-210-102 501-210-300
G4	with Shoulder Balance - fits into two holes on handle. Tin be reversed to fit either right or left shoulder. See photos. Models include: G4AR (black only), G4B (colors), G4M (modular).  Announced in 1954.	C63.341 501-210-102 501-210-300
G5	Push-to-talk - Has a rectangular push-to-talk bar on the handgrip. Models include: G5AR (mobile radio), G5BR (four-wire circuits, paging),G5CR (FAA, individual line systems), G5ER (535 set), G5FR (Bendix MRT9 radio), G5GR (two,4-wire private line stations), G5HR (102-blazon key equipment), G5JR (#300 switching system), G5KR (2A farm interphone), G5LR (617 set up, COPAN), G5MR (Air-ground base station), G5NR (625-type set), G5PR,RR (596E set).	501-210-102 501-210-300
G6	Dumb Hearing - receiver amplifier and volume command in handset. G6B (tardily) and G6BM have a 0.02mf cap across terminals R and G.  G6AR has a single stage transistorized amp.  (See G66.)  Introduced in 1961.	501-210-300 501-211-102 501-211-400
G7	Weak Speech - transmitter amplifier and volume command in handset.	501-210-300 501-211-102 501-211-400
G8	Noisy Locations - receiver amplifier with volume command and push-to-listen switch, which decreases transmitter output and increases receiver output.	501-210-300 501-211-102 501-211-400
D-180413	Modified G8B for noisy locations - provides boosted receiver proceeds.  (See G66.)	501-211-102 Addendum I1
G10	Used primarily by Government Agencies for Security Reasons - To heed or talk it is necessary to depress a push in the middle of the handset. Intended for peculiarly engineered lines - not for full general telephone employ. These handsets are mill sealed units.  If either handset or cord was defective, both were replaced as a unit of measurement. Models include: G10A-F. G10A and C: two buttons on handle command receive and transmit separately.       C has an H6F cord with 425A plug. G10B and D: single button controls both functions simultaneously. D has an H4DD string with 396A plug. There are several button configurations.  Most found sets are marked but G10 with no suffix.  The suffix is on the box, then an installer replacing a defective unit knew what is being installed. Several handsets take been constitute marked G10F (biscuit single push photo).	501-210-301 Tel. Appliance and Equip. 1/70
G11	"Used with 15A, 15B and 15C apparatus which are part of 520A, 520B and 2520C explosion-proof telephone sets. Designed to provide protection confronting the probability of explosion resulting from flames originating within the handset nether extreme conditions of operation." (Makes you wonder nigh the rest of the handsets, doesn't it?)  T3 transmitter, LA1 receiver, aluminum lined cavities.	501-210-102 (added before consequence ix)
G12	Early plug-in type cord Uses H4DB string with Trimline-way plugs.	501-210-103
G13 G13B - photo from Steph Kerman G13D - photo from Jeremy Walters	Amplified Receiver for public telephones Provides amplification, like the G6B, except uses a slide switch instead of a potentiometer and has an armored cord (G13A and G13B). Switch provides 10 or 20db gain and bound returns to normal position (0db). Bachelor in -52 gray. G13B - photo from Steph Kerman Subsequently G13D handsets used two pushbuttons.  Button and concord either for 10db or both for 20db gain. Available in -52 gray or -104 chocolate brownish. Caps are ultrasonically bonded to the handle, therefore components cannot be replaced. The handset and cord are replaced as a unit.	____________ 501-211-102 consequence 2 or after 501-211-400
G15A	Basic handset with modular connection. Replaced G3 for modular applications. (Model number is not marked on handset, just Bell Arrangement markings.)	501-210-103
G36	Long Route Replaces original handset where 3db transmission gain or low current performance is required.  (Only works with rotary dials or touchtone dials equipped with a mutual switch contact system to prevent dial sidetone amplification, and is polarity sensitive.)  When installed, a sticker was placed on the bottom of the telephone, "Equipped with G36 Handset", as in that location are no user controls visible to betoken the presence of the amplifier.	501-211-103
G66	I mpaired hearing Receiver-amplifier unit of measurement and polarity guard.  Pushbutton provides an additional 10db proceeds in the receiver and 10 db loss in the transmitter circuit.  This handset is intended just for use by customers who crave more receiver gain than that provided by G6 type handset. Recommended in place of the D-180413 handset.	501-211-102 Effect 6
GF	Handset for 5302. Uses a G1 or G3 handle, with adapters for HA1 and F1 elements used in the F1 handset. See photograph	502-400-301 NY
732A	This is actually a receiver that looks like a G3 handset. Information technology has no transmitter element, the cup has no terminals installed and the transmitter cap has no holes! Used on 691A subset.  (732A is in the coding series for receivers.) See photo	502-200-101
KS-16504	High allegiance dynamic microphone. Used with 8A and 9A announcement systems (to record the message), or equally function of a loftier allegiance conference set.	501-210-120 501-210-300
J1	Control of 1-type telephone reporting ready from a remote line.  Similar to G5 with a switch controlled oscillator for generating a 1475 cps signal.	501-210-104
Link to like info on F Handset Models.

Notation: Early models had separate cord servant parts in the transmitter crenel.  Later models had the retainer molded into the transmitter cup.  The parts are not interchangeable.

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Donation of photos (or bodily phones) is profoundly appreciated.

CONTRIBUTORS
Thanks to ATCA and TCI members, including: Rick Walsh, David Massey, Jeremy Walters, Todd Bernstein, David Willingham, John Chalupsky, Steve Hilsz, Steph Kerman, Stan DeOrsey, Steve Schlink, Jonathan Sowers and Vern Potter.

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