Condition: This watch is in Mint Condition.* Complete with Box and Papers. The 1815 RATTRAPANTE PERPETUAL CALENDAR unites two refined classic complications in a wristwatch: a chronograph-rattrapante and a perpetual calendar with a moon-phase display. The model version in pink gold features an argente-coloured dial crafted from solid silver.Launched in 2013 the 1815 RATTRAPANTE PERPETUAL CALENDAR marked a milestone in A. Lange and Sohne's more recent history: no less than seven chronograph calibres had previously been crafted by the Saxon manufacture. 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 outstanding timepiece excels in the measurement of short and long distances and thanks to its eponymous complications the 1815 RATTRAPANTE PERPETUAL CALENDAR sets standards in both short-time measurement and the display of calendar periods.The rattrapante function of the 1815 RATTRAPANTE PERPETUAL CALENDAR represents one of the greatest horological challenges. In addition to the conventional functions of a chronograph this sophisticated complication has the ability to measure 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. Located in the heart of Beverly Hills, we are one of the largest dealers of pre-owned high end watches in the World. We own all our own inventory and are a one stop shop for watch enthusiasts. We built our business through word-of-mouth referrals, with clients looking for unique timepieces not easily found at primary retailers or secondary market sources. Our expertise and passion for watches, in parallel with our exclusive industry relationships, positions us as a major influencer of tastes, trends, and values in the watch boutique economy. We also serve as expert consultants for those requiring purchasing guidance as well as building and growing noteworthy watch collections.