Chassis of Bonochord transistor hearing aid

Chassis of Bonochord transistor hearing aid.

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Chassis of Bonochord transistor hearing aid.
Science Museum Group
© The Board of Trustees of the Science Museum

Chassis of Bonochord transistor hearing aid.

Details

Category:
Sound Reproduction
Object Number:
1955-370
type:
hearing aid
credit:
Hearing Aid Manufacturers Association