The leap year is upon us, and what better way to celebrate the 29th day of February with a selection of watches that can keep up with this quadrennial event. I’m talking about the quantième perpétuel of course! Or “QP” as a watch nerd might refer to it (guilty here!). But most of you know it as the perpetual calendar.
Most watches that contain a calendar function require constant adjustment to ensure the correct date is displayed. These watches will reset after completing 31 24-hour cycles (i.e. a full month). But since our calendar contains leap years and an irregular number of days per month, clever watchmakers have developed mechanical complications that can pace our calendars without the annoyance of the date requiring adjustment every month. The perpetual calendar complication is the granddaddy of them all, displaying the day, date and month, all while “knowing” the number of days in each month and thus automatically adjust for leap year. The next time these perpetual calendars will have to be adjusted is in the year 2100, which of course presumes you keep these beauties wound and running until that time!
Now, as for this week’s selection of pre-owned perpetual calendars — I’ve ran the gammut from the very traditional to the very modern. When I say modern, I’m referring to more recent designs which display the day/date “digitally” and/or which have movements which can be quickly and easily set, lacking the fuss of most traditional perpetual calendar calibers (which cannot be set backwards in time, or have the date adjusted during ~10pm-3am without damaging the movement).
Take a look and see what you think…