Double pole receiver with no permanent magnet

Double pole receiver with no permanent magnet (wood case)

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Double pole receiver with no permanent magnet (wood case)
Science Museum Group

Double pole receiver with no permanent magnet (wood case)

Details

Category:
Telecommunications
Object Number:
1915-198
type:
receiver
credit:
General Post Office