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by SamReidHughes 2700 days ago
The Zenith Defy Lab watch has accuracy of -0.5/+0.5 seconds per day, which matches and/or beats quartz watches (that aren't thermocompensated). Rolexes, which have a classical movement design, are pretty close, promising -2/+2 spd. Quartz watches' accuracy also varies depending on orientation, for what it's worth. (It has an effect on the order of 1-2 seconds per year.) Related EEVBlog link: https://www.youtube.com/watch?v=zILwgQhjC_Q