Wireless valve, acoustics equipment from the H.M

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Wireless valve, acoustics equipment from the H.M
Science Museum Group
© The Board of Trustees of the Science Museum

Wireless valve, acoustics equipment from the H.M. Signal school, Portsmouth.

Details

Category:
Acoustics
Object Number:
1947-224/45
type:
valve
credit:
Admiralty (Tactical & Staff Duties Division)