Metal-diaphragm loudspeaker

Metal-diaphragm loudspeaker, energised, on baffle, c. 1935

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Metal-diaphragm loudspeaker, energised, on baffle, c. 1935
Science Museum Group
The Board of Trustees of the Science Museum

Metal-diaphragm loudspeaker, energised, on baffle, c. 1935

Details

Category:
Radio Communication
Object Number:
1987-675
type:
loudspeaker
credit:
Midgley, J.D.