Eternal Time: 6 Modern Perpetual Calendar Watches
In modern watchmaking, a perpetual calendar indicates the date, and corrects automatically for months with less than 31 days, as well as leap years. Unless the movement takes into account century years that are not leap years, a perpetual calendar will need manual adjusting in 2100, 2200 and 2300. Usually, a perpetual calendar combines additional complications (a moon-phase, for example). From WatchTime's February 2018 issue, here are six watches that are (almost) ready for eternity.
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