Berthou-Ader telephone instrument

Berthou-Ader telephone instrument made by the Societe Generale

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Berthou-Ader telephone instrument made by the Societe Generale
Science Museum Group
© The Board of Trustees of the Science Museum

Berthou-Ader telephone instrument made by the Societe Generale des Telephones

Details

Category:
Telecommunications
Object Number:
1923-257
type:
telephones
credit:
Institution of Electrical Engineers