The Big Pilot’s Watch and the perpetual calendar are a perfect match. The four sub dials and the four-digit year display are shown off to high effect on the large dial. The date, weekday, month and moon phase are also effortless to read. For the first time, IWC is now combining a Big Pilot’s Watch Perpetual Calendar with a white ceramic case, the hallmark of its “Lake Tahoe” editions. The black dial and the white rubber strap with textile inlay has a striking contrast. The perpetual calendar is mechanically programmed to automatically recognise the different months lengths and the leap years. It will continue running correctly without any manual correction until the year 2100. The calendar module is driven by a single nightly switching impulse delivered by the IWC-manufactured 52615 calibre. Two barrels, wound up by a Pellaton winding system with ceramic components, store a comfortable seven days power reserve.