German crystal wavemeter type PQK 1 s/n 15651/1939

German crystal wavemeter type PQK 1 s/n 15651/1939

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German crystal wavemeter type PQK 1 s/n 15651/1939
Science Museum Group
© The Board of Trustees of the Science Museum

German crystal wavemeter type PQK 1 s/n 15651/1939

Details

Category:
Radio Communication
Object Number:
1981-908
type:
wavemeter
credit:
West, R.