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by palmotea
214 days ago
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>> Simply holding the watch’s built-in speaker up to the receiver of a push-button telephone allowed users to place calls to stored numbers So a miniaturized version of one of this (which I totally uselessly had as a kid): https://www.youtube.com/watch?v=z438yRW0rGQ. |
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https://phonelosers.com/redbox/tonedialer/
https://hackaday.com/2014/09/05/radioshack-phone-dialer-red-...