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'Post Office Telephones automatic telephone tones' gramophone record
Single sided 10 inch gramophone record, 'His Masters's Voice: Post Office Telephones: Automatic telephone tones'. Number OTP 5725, ref no JHS 15, made by the Gramophone Company Limited, England, 1930-1960.
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Single sided 10 inch gramophone record, 'His Masters's Voice: Post Office Telephones: Automatic telephone tones'. Number OTP 5725, ref no JHS 15, made by the Gramophone Company Limited, England, 1930-1960.
This record was produced to familiarise the public, as well as possibly Post Office staff, with the specially-generated tones that indicated the progress of a telephone call when handled by an automatic exchange. It is believed to have been used in conjunction with the Post Office demonstration telephone set that was provided to schools.
- Measurements:
-
overall: 4 mm x 255 mm diameter, .1 kg
- Materials:
- polyvinyl chloride (PVC) and paper
- Object Number:
- 2006-204/1
- type:
- gramophone record
- Image ©
- The Board of Trustees of the Science Museum
