Now presented in an 18K white gold case with a gorgeous solid pink gold dial —salmon color— comes the new A. Lange & Söhne 1815 Rattrapante Perpetual Calendar combining three of the most sophisticated watchmaking complications in a classic design. The equally rare and ambitious combination of a split-seconds or rattrapante chronograph with a perpetual calendar now appears with a stunning pink gold dial in a limited edition of only 100 pieces.
First launched in 2013, the A. Lange & Söhne 1815 Rattrapante Perpetual Calendar marked a milestone in the brand’s revival history with no less than seven chronograph calibres had previously been crafted by the Saxon manufactory. Equipped with a specially developed movement, it united three of the most elaborate complications while maintaining the classic, elegant design of the 1815 watch family.
The A. Lange & Söhne 1815 Rattrapante Perpetual Calendar in White Gold and Pink Gold Dial sets standards in both short-time measurement and the display of calendar periods. In addition to the conventional functions of a chronograph, this sophisticated complication is capable of measuring intermediate times and comparative times as well as determining minimum and maximum values in the course of one minute. Since the balance wheel of the manufacture calibre L101.1 beats with six semi-oscillations per second, the stopped times can be recorded with an accuracy of one sixth of a second. High-precision readings are assured thanks to the additional graduation on the peripheral minute scale.
The precisely orchestrated proceedings within the movement can be observed through the sapphire-crystal case back. The classic two-column wheel transmission is used to control the measurement of stopped and intermediate times. As is typical for A. Lange & Söhne, technical intricacy is coupled with a high degree of artisanship. The upper surfaces of all moving parts are decorated with straight graining while the peripheral chamfers are polished. Only an experienced finisseur has the skill to polish the bevels to sharp and flat perfection.
The Lange calibre L101.1 is composed of 631 individual parts with the mechanism of the perpetual calendar alone requiring 211 components and a further 206 account for the rattrapante chronograph mechanism. The calibre provides a power reserve of 42 hours
The high-precision moon-phase display has also been programmed with the long term in mind. It so closely emulates the duration of the synodic orbit of the earth’s satellite that it would take 122.6 years for the display to be corrected by one day. While the rattrapante chronograph is capable of measuring different time intervals to a fraction of a second, the remarkable technical feat of the perpetual calendar lies in its “long-term memory”. As its name suggests, the complex and prescient mechanism ensures that the date, day of the week and month are correctly displayed ‒ every single day, during decades, even taking leap years into account. The calendar indications must only be corrected by one day but not until 1 March 2100; according to the rules of the Gregorian calendar, the leap year will then be skipped.
Not only the technical details distinguish the A. Lange & Söhne 1815 Rattrapante Perpetual Calendar but also the well-organized arrangement of its displays. Following the Datograph Perpetual Tourbillon from 2019 and the Lange 1 Perpetual Calendar from 2021, the new 1815 Rattrapante Perpetual Calendar is the third A. Lange & Söhne timepiece showcasing an 18K pink gold dial providing a warm, golden hue contrast against the elegantly cool white gold case measuring 41.9 mm in diameter and 14.7 mm in thickness.
With a traditional railway-track minute scale, Arabic numerals and the harmonious arrangement of the four subsidiary dials, the dial embodies the essence of the watch family named after the birth year of Ferdinand Adolph Lange. The manifold displays of the perpetual calendar and the rattrapante chronograph echo the classic aesthetics of earlier Lange pocket watches. The two pairs of combined calendar indications are arranged at 3 and 9 o’clock. The left subsidiary dial shows the date and day of the week, the right the month and leap year. Sharing an auxiliary dial with the subsidiary seconds at 6 o’clock, the moon-phase display provides an expressive colourful accent. The minute counter and power-reserve indicator are located at 12 o’clock. The shorter gold hand in the inner circle reveals when it is time to deliver new power to the movement via the winding crown. The longer hand made of blued steel imparts information about the stopped minutes.
The A. Lange & Söhne 1815 Rattrapante Perpetual Calendar in White Gold with Pink Gold Dial is available in a limited edition of only 100 pieces and is a boutique exclusive timepiece.
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