TELEPHONE No. 43
Originally called the "Telephone, House, Wall, Intercommunication, Secret, 15 way" it was later renamed as the Telephone No. 43.

Each telephone on the system required a Battery, Leclanche No. 1 CZ, 3 cell.

Could be used in conjunction with the single way Telephone No. 37.

Telephone includes (1928):-
1 x Hook for Micro telephone.
1 x Switch Selector.
1 x Bell, Trembler.
1 x Press Button.
1 x Vibrator.
1 x Coil Induction.
1 x Relay, Cut-in.
1 x Telephone No. 32.

The handset is called a Telephone No. 32.

Made obsolete in 1947.

Circuit Diagrams - TL232 and N143.

Note - that there is an indicator in the top box, which is restored by means of a pull cord..

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Last revised: September 24, 2025

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