TELEPHONE No. 107
This L.B. wall telephone was used with a Bellset No. 14 on call box cabinets in the London Stock Exchange.

These phones were powered by a local battery and a 22v DC power lead fed directly from the London Wall Telephone Exchange.

The switch hooks consisted of the usual contact set comprising of three springs all making together, but it also included two break contact sets.

The bell is configured for 250ohms.

Introduced circa 1923.

Telephone includes (1928):-
2 x Cords, Instrument No. 116.
1 x Cord, Instrument No. 222.
1 x Transmitter No. 1.
1 x Receiver, Bell No. 1A.

Circuit diagram - Misc. 1066 & LD35.

LD35 Paster Diagram

 

 
 
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Last revised: September 14, 2025

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