Telegraph keying unit comprising double current and single current keys on one base

Made:
United States
Telegraph keying unit comprising double current and single

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

Telegraph keying unit comprising double current and single
Science Museum Group
© The Board of Trustees of the Science Museum

Telegraph keying unit comprising double current and single current keys on one base, with glass cover (American manufacture)

Details

Category:
Telecommunications
Object Number:
1968-466
Materials:
glass
type:
keying unit
credit:
Baker, R.L.