A. Lange & Söhne 1815 Rattrapante Perpetual Calendar

This piece is part of our First Look collection—your early access window into upcoming arrivals before they officially launch on the site. If you’d like more details or wish to reserve this watch ahead of the public release, simply click the Inquire for Priority Access button at the top of the page, complete the short form, and a member of our team will reach out shortly. There are few watches capable of stopping even seasoned collectors mid-sentence. The A. Lange & Söhne 1815 Rattrapante Perpetual Calendar is one of them. Reference 421.032FE represents Lange operating at full capacity: technically uncompromising, visually disciplined, and obsessively finished at every level. Introduced in 2013, the model brought together two of watchmaking’s most revered complications—a rattrapante chronograph and a perpetual calendar—inside the clean, historically grounded framework of the 1815 collection. The result is extraordinary, not because it looks complicated, but because it doesn’t need to. Housed in a 41.9mm pink gold case, this example pairs warm metal with an argenté solid silver dial that feels unmistakably Lange. The familiar 1815 signatures are all here: railroad minute track, Arabic numerals, beautifully balanced subsidiary registers, and a layout inspired by the manufacture’s historic pocket chronographs. But beneath that calm surface lies immense mechanical depth. The split-seconds chronograph allows simultaneous timing events to be measured independently, while the perpetual calendar accounts automatically for varying month lengths and leap years—requiring no correction until the year 2100. Even the moonphase display is engineered with staggering precision, accurate to one day every 122.6 years. And then there’s the movement. Visible through the sapphire caseback, the manually wound Caliber L101.1 is among the great visual spectacles in modern watchmaking. Twin column wheels, hand-finished chronograph levers, black-polished steelwork, sharp inward angles—every surface reveals another level of craft. Lange chronographs already sit in rarefied territory; adding a rattrapante mechanism and perpetual calendar only heightens the sense that you’re looking at something fundamentally special. Fitted to a brown Lange alligator strap with a signed pink gold deployant clasp and accompanied by its full set, this is the kind of watch that reminds you why high horology still matters. True complexity is making the impossible look effortless.