Wall instrument with solid back transmitter

Wall instrument with solid back transmitter, mouth piece missing

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

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Wall instrument with solid back transmitter, mouth piece missing
Science Museum Group
© The Board of Trustees of the Science Museum

Wall instrument with solid back transmitter, mouth piece missing

Details

Category:
Telecommunications
Object Number:
1914-760
type:
wall instrument
credit:
General Post Office. Telecommunications