SIEMENS BROTHERS No. 85
Wall telephone based on the circuitry of a GPO No. 162, but with a self contained bellset.

This telephone had a non-ASTIC induction coil and a transformer.

Front view
 
Internal view
The line cord on the above telephone is not original
The silver metal object, centre left, is a transformer.  The induction coil is to the left of the bell ringer.
 
Circuit Diagram
 

 

 

Component Identification
Induction coil - Bellset left
Bell ringer - Bellset centre
Capacitor - Bellset right
Transformer - Telephone centre

Inside the phone - the bellset terminals are marked for identification
 

 

 

 
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Last revised: November 05, 2013

FM2