Campbell mutual standard by Cambridge Instrument Co.

Campbell mutual standard by Cambridge Instrument Co., No

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Campbell mutual standard by Cambridge Instrument Co., No
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.