TELEPHONE No. 133


Laryngaphone wall telephone.

These were used in noisy areas.

Used on CB and Auto systems.  The CB variant had a notice frame in place of the dial.

Handset is a Telephone No. 186, which used a Transmitter, Inset No. 11.

Circuit diagram N233 (Dated 1931).
 


 

 
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Last revised: May 12, 2021

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