Intercom / Telephone
 
 

Intercom system
 

Intercom: ??
 
 

.......

Intercom: ??                                                            Wiring info.
 
 

......

Intercom: ??                                                                Receiver part
 
 

Bell system (missing bell's)
 
 

Intercom: ??
 
 

.......

JT Model 1920                                                                      JT Handset



 
 

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