The four internal counters and the four-digit year indication show off, giving life to a striking design on the large dial. The date, day of the week, month and moon phase indications ensure perfect legibility. For the first time, IWC combines a Big Pilot's Watch Perpetual Calendar with a sand-colored ceramic case, the distinctive trademark of the Mojave Desert editions. The dial in a soft dark brown and the sand-colored rubber strap with fabric insert complete this exclusive military design. The model is inspired by the Navy's aviation estates and the barren landscapes of China Lake, the largest US Navy area in the Mojave Desert. The mechanical program of the perpetual calendar automatically recognizes the different lengths of the months and leap years, ensuring perfect operation without any manual correction until 2100. The calendar module is operated by a single night switching pulse of the IWC-manufactured 52615 caliber, while the two barrels, powered by a Pellaton charging system with ceramic components, ensure a practical power reserve of seven days.