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WE Secretarial Sets
412, 512, 1512, 712 (Princess), AD1 (Trimline) and 751 (Panel)

©2002-14 paulf.  All rights reserved.

(What's this copyright notice?)

The turn key was used to transfer calls to a secretary or answering service.
I was told that Secretarial sets were popular in the Washington, DC area,
where they were used in large, fancy apartment complexes with local PBXs.

Label by the key on most models is marked:  TEL LINE / SECRETARIAL

1. TEL LINE: Operates as a normal single line set.  Ringer rings and can be answered directly.

2. SECRETARIAL:  CO or PBX line is routed from the set to a secretary or answering service.
e.g.  when in conference or away from the office or apartment.

A separate (second) line may be returned from the PBX to permit direct contact
between the subscriber and the secretarial service.

Sets after the 412 were apparently modified from standard production sets
in the Western Electric distribution houses or refurb facilitites.

In addition to the sets shown here, most two-line set BSPs have instructions
to modify the set for secretarial service.

Western Electric had been serving the needs of Secretairal Services since 1920 with several products.
A January 1957 Bell Laboratories Record article describes the new 557A and B switchboards,
which could also support remote secretarial services using switching in the central offices and line concentrators.

Here's another business that was decimated by automation, after voicemail was introduced.

©2002-14 paulf.  All rights reserved.
(What's this copyright notice?)
WE 412BC-4, ivory
Western Electric 412BC-4

   See details in WE 300-types chart
Western Electric 512

The second ringer with square gong (and different ring tone) can be used to signal incoming calls from the secretarial service.  (Requires a second line from the PBX.)

  See details in WE 500-types chart

WE 512 bottom plate
Marked on bottom 512BCR

Note the phenolic base for the buzzer and ringer.

(WE512 Photos courtesy of an anonymous collector
 -- my lips are sealed.)

WE1512 10-button set

Western Electric 1512

Here's the follow-on model in early TouchTone!

Also in green.

Do you have photos of a 2512 (12-button set) to share?

  See details in WE 1500-types chart , WE 2500-types chart
WE1512 Details
The key label looks like the same one designed for the rotary set that's been cut to fit.
WE 512BC white
Western Electric 712BC Princess

Modification instructions are included in the BSPs, including 502-701-101, issue 3, April 1977, Table D.

This set was apparently modified and marked at a Western Electric distribution house or refurb facility.

If there was a label near the key on this set, it was removed before the photo was taken.  It probably wouldn't have survived a thorough housing cleaning and polishing.

  See details in WE Princess Sets

(There are 1712 and 2712 Secretarial sets also)

WE Trimline Secretarial
And here's a rotary Trimline with a similar switch and the same darned label designed for a rotary set!  They must have had a warehouse full of them.

Marked on a paper label on the bottom:  
   AD1 MOD
   E 2110

WE 751 Panel - Secretarial
751C Panel Phone modified for Secretarial Service

Marked MOD E2012S FIG 5 B/C

The label, designed for the 512 set, doesn't fit well here either.

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©2002-14 paulf.  All rights reserved.