Rheostat, G.P.O., 956

Rheostat, G.P.O., 956

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Rheostat, G.P.O., 956
Science Museum Group
© The Board of Trustees of the Science Museum

Rheostat, G.P.O., 956

Details

Category:
Telecommunications
Object Number:
1923-267
type:
rheostat
credit:
Institution of Electrical Engineers