Portable telephone for use on Magneto, CBS and CB exchanges.

There were three versions:-
Telephone No. 92 Mk 234
Fitted with Transmitter No. 2 and Bell receiver.

Telephone No. 92 Mk 235
Fitted with Transmitter No. 3 and Watch receiver (see picture).

Telephone No. 92A
As per the Mk 235 except the circuit is modified to allow the telephone to be used on CB exchanges.

Circuit diagram - Web users click here - CD users click here

Pictures were taken in 1915.


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Last revised: December 31, 2017