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"pota-pota" clock or "Auto-Flip" clock which were popular around the 1970s-80s before digital clocks took over.
Genex said:
"pota-pota" clock or "Auto-Flip" clock which were popular around the 1970s-80s before digital clocks took over.
The mechanism was also used in many other areas too (e.g. the departure/arrival boards in airports).
Right. Odd how I never noticed or even knew what they were called. Amazon still sells flip clocks too.