STC SWITCHBOARD PICTURES

These pictures are of unknown models

 

PMBX at Connaught House - 1930

 

PMBX at Connaught House - 1930

 

PABX at Somerset House - 1938

 

PABX at Liverpool Airport - 1965

 

Loudspeaking telephone - 1958

 

 

 
 
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Last revised: August 10, 2022

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