i didn't bother to "measure" the accurcy of my 111, because:
(1) the movement is non-hacking (the second hand won't stop when you pull the crown out), that means i didn't have to sync it to the atomic clock within the second;
(2) the dial doesn't have minute marks on it, so 12:01:00 and 12:01:30 looks almost the same to me anyway;
(3) the movement is COSC certified, so as long as it running within spec (-4/+6 per day), i am fine with it.
after about 2 weeks of wear, the deviation from the atomic clock seems to be within the minute (when the atomic clock said 12:04, my 111 said its 12:04, don't care about the seconds).
the second hand to me is just an running indicator telling me the watch is still running.
and all these actually makes me less obsessed with having the second hand sync to the atomic clock.
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