Campbell mutual standard by Cambridge Instrument Co.
- Made:
- 1925-1930
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Science Museum Group
© The Board of Trustees of the Science Museum
Campbell mutual standard by Cambridge Instrument Co., No. L-16394
Details
- Category:
- Electricity and Magnetism
- Object Number:
- 1971-313
- type:
- mutual standard
- credit:
- South London Electrical Co.
