TELEPHONE No. 51


Telephone, House, Wall, intercommunication, 15 way, non-secret.

Handset is a Telephone No. 30.

Found in the 1928 GPO Rate Book and made obsolete in 1947.

Circuit Diagram - TL 230.

Circuit Diagram - N151.

Information on all House telephone systems

 
 
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Last revised: November 21, 2021

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