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This Watch Has 621 Parts, But You Wouldn’t Know It From the Dial

A startlingly spare face disguises the supercomplex inner workings of A. Lange & Söhne's new perpetual calendar watch.

New Lange 1 perpetual calendar in white gold with a solid pink gold dial comes in an edition of 150.

Source: A. Lange & Söhne

Perpetual calendar watches are perennial favorites among aficionados, but they’re also useful for those who, during the pandemic, have adopted the term “Blursday” to describe the monotony of each day bleeding into the next. Thanks to a handy indicator on the dial, a quick glance can remind you (again) exactly what day of the week it is.

Crafting a perpetual calendar watch is a formidable feat for any watchmaker. It’s classified as a “grand complication,” and with good reason: It keeps track of the time, day, date, month, and leap year, in perpetuity, with the exception of one day every 100 years. (Feb. 29 is omitted in one leap year every century, in accordance with the Gregorian calendar.)