1931 design 'M' shape cobalt steel permanent magnet

Made:
1931

1931 design 'M' shape cobalt steel permanent magnet for moving coil loud speaker

Details

Category:
Radio Communication
Object Number:
1932-10
Measurements:
overall: 90 mm x 180 mm x 50 mm,
type:
magnets
credit:
Darwins Ltd.

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