Metal-diaphragm loudspeaker
Metal-diaphragm loudspeaker, permanent magnet, unit only, c. 1935
Details
- Category:
- Radio Communication
- Object Number:
- 1987-676
- type:
- loudspeaker
- credit:
- Midgley, J.D.
Metal-diaphragm loudspeaker, permanent magnet, unit only, c. 1935