1931 design: 'four claw' cobalt steel permanent magnet

Made:: 1931

1931 design: 'four claw' cobalt steel permanent magnet, for moving coil loud speaker.

Details

Category:: Radio Communication

Object Number:: 1932-7

type:: magnets

credit:: Darwins Ltd.

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1931 design: 'four claw' cobalt steel permanent magnet

Details

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