Was gifted one of these recently. Another interesting mechanical clock that hides as a larger LED display. Each
digit segment is it's own neon bulb, a synchronous motor drives a cylinder that touches contacts that turn on and off each segment. No am/pm indicator. So far mine has all the bulbs working and is keeping time. Has anyone seen this particular mechanism in other clocks?
This video on youtube shows what it looks like on the inside:
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