The A. Lange & Söhne 1815 Rattrapante Perpetual Calendar, reference 421.025FE/LS4212AB, is a masterful example of high horology, uniting three of the most challenging watchmaking complications in a classic and elegant design. Housed in a 41.9 mm platinum case with a silver dial and paired with a black alligator leather strap, this manually wound timepiece features both a rattrapante (split-seconds) chronograph and a perpetual calendar, as well as a moon-phase display and power reserve indicator.
Powered by the breathtaking in-house calibre L101.1 movement comprises 631 individual parts, offering a 42-hour power reserve. The movement’s intricate finishing and traditional craftsmanship are visible through the sapphire crystal case back, exemplifying A. Lange & Söhne’s commitment to technical excellence and artisanal detail.
The perpetual calendar automatically accounts for leap years and requires adjustment only once every 100 years. While the Rattrapante Chronograph mechanism is controlled by a classic duo column-wheel system, which enables the measurement of intermediate or split times in addition to standard chronograph timing. Allowing for the comparison of multiple lap or intermediate times within a single timing event, all with high precision to one-sixth of a second.
Circa 2020, this A. Lange & Söhne 1815 Rattrapante Perpetual Calendar is in overall excellent condition. Originally retailing at $253,00USD (approximately $395,000AUD) and often listed for $230,000 ~ $330,000AUD, our exceptional example is one of the best-priced examples of this model on the global market today - by a significant margin. The watch is offered with its original set of box and papers, and is available at our Sydney Store via Appointment Only.
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