Siemens' polarised relay, 1869
- Made:
- 1869
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Science Museum Group
© The Board of Trustees of the Science Museum
Siemens' polarised relay, 1869
Details
- Category:
- Telecommunications
- Object Number:
- 1933-443
- type:
- polarised relay
- credit:
- Kindly donated by Telent Technology Services Limited
