Operadio - Model 4M25C - Intercom - Original Service Manual - 1950

Scott - Model 510 - Receiver - Original Service Manual - 1950

Masco- Model Midgetalk - Intercom - Original Service Manual - 1950

Operadio - Model 4A25-E- Intercom - Original Service Manual - 1950

Operadio - Model $A35-4A55 - Intercom - Original Service Manual - 1950

Western Electric - Model Ekotape - Recorder - Original Service Manual - 1950

Silvertone - Model 9131 - TV - Original Service Manual - 1950

Operadio - Model 4A35/4A55- Intercom - Original Service Manual - 1950