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Desk Telephone Apparatus

Desk Telephone Apparatus
Siemens Germany, 1878 y.

Desk Telephone 1878, Germany, Siemens   Device made in a wooden case. Used simultaneously as a microphone and a hearing device. When one person was talking, the other had to remain silent. Needed high degree of voice discipline as 'counter talking' could not take place! Initially, the phone did not have a ringer. Used by the German Post Office Authority.