Siemens compound relay, 1876

Made:
1876
Siemens compound relay, 1876

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Siemens compound relay, 1876
Science Museum Group
© The Board of Trustees of the Science Museum

Siemens compound relay, 1876

Details

Category:
Telecommunications
Object Number:
1933-444
type:
relay
credit:
Kindly donated by Telent Technology Services Limited