Perpetual calendar

Hands-on with the Lange 1 Tourbillon Perpetual Calendar Handwerkskunst (with live photos and pricing)

Lange recently unveiled the third in its boutique-exclusive Handwerkskunst series, the Lange 1 Tourbillon Perpetual Calendar Handwerkskunst, featuring a specially decorated dial and movement, as well as a hand-painted date display.

Explaining The Patek Philippe Reference 3970 Chronograph Perpetual Calendar

Made from 1986 to 2004, the Patek Philippe Ref. 3970 was for many years the benchmark chronograph with perpetual calendar wristwatch. Widely regarded as less desirable than the preceding Ref. 2499 or subsequent Ref. 5970, the Ref. 3970 is nevertheless a significant timepiece.

Hands-on with the Lange 1815 Rattrapante Perpetual Calendar, and explaining its movement construction (live photos and pricing)

Unveiled at SIHH 2013, the Lange 1815 Rattrapante Perpetual Calendar is the first wristwatch from Lange combining the split-seconds and perpetual calendar complications. 

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