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Early quartz had a common feature which is now absent even in HAQ: some sort of synch button
In Omega cal. 15xx of OMC fame, it was a ‘TSA’ button that advanced the watch by one second per short press (and if held down, retarded the watch):
Even in the two hand Omega cal. 1350, which was completely button-controlled, a short button press both advanced the watch by one minute and reset the internal seconds to the top of the minute. However, it appears…
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