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This IWC Big Pilots Perpetual Calendar features the brand's technical marvel, calibre 51614. This calibre boasts such technology as an advanced Pellaton winding system, easily generating enough power for a seven day reserve as well as all the complications. The star of the show is the perpetual calendar, particularly impressive because it features a four-digit year and is set entirely with the crown. There's even an astronomical complication, a moonphase, which shows the 29.5 day lunar cycle for both northern and southern hemispheres. All this housed in a very attractive rose gold case, with a dial to match, featuring a design that displays the myriad data in an intuitive and graceful fashion. This IWC has undergone a thorough inspection of water resistance, accuracy, functionality and condition to determine the level of reconditioning required to meet our strict standards. It has also been referenced against technical documents and manufacturer records where available to ensure authenticity and a clean history. This is a pre-owned IWC Big Pilots IW502639. It has a 46mm Rose Gold case, a Champagne Arabic dial, a Alligator - Black bracelet, and is powered by an Automatic movement. The case has a 3536xxx serial and paperwork is dated 19 June 2014, making it 3 years. It originated in the uk, and comes complete with box. It is also supplied with a comprehensive 12 month Watchfinder warranty.