Original master disc used by E J Wender in the design of the ‘TIM’ speaking clock
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| Original master disc used by E J Wender in the design of the ‘TIM’ speaking clock | |
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| Manufacturer | (unknown) |
| Production years | c. 1936 |
| Production location | (unknown) |
The first automatic ‘speaking clock’ machines were developed by the British Post Office in the mid-1930s. The announcements were recorded on glass discs using the same technique as for cinema film sound tracks.
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[edit] In the Science Museum's Records
Inv. No: 1942-10 Source: E J Wender