STERLING TELEPHONE AND ELECTRIC Co. Ltd

No. U 500
Reply and Call Wall Telephone, comprising:-
Granular Carbon Transmitter (No. U 45), Induction Coil, Double Pole Watch Receiver (No. U 30), Call Bell, Automatic Switch Hook and Patent Combined Ringing Key and Call Wire Selector.

The metal parts are Nickel-plated and the woodwork Solid Walnut.

The Automatic Reply and Call System has been designed for cases where it is not desirable or convenient to use a Central Station Annunciator Switchboard. It is, generally speaking, most useful where the Principal wishes to call all the outer offices, or vice versa.

Taken from the Sterling Catalogue No. 11 & 12

Last revised: January 14, 2025