Lambert's capacity key

Made:
1929
maker:
Muirhead and Company Limited
Lambert's capacity key, no. 59430, by Muirhead and Co. Ltd

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Lambert's capacity key, no. 59430, by Muirhead and Co. Ltd
Science Museum Group
© The Board of Trustees of the Science Museum

Lambert's capacity key, no. 59430, by Muirhead and Co. Ltd., 1929

Details

Category:
Telecommunications
Object Number:
1989-1014
type:
capacity
credit:
Muirhead Vactric Components Limited