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).

Possibly made by TMC.


 


 

 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: January 31, 2023

FM