IWC · Automatic

51564

The 51000-family Pellaton automatic carrying Kurt Klaus's perpetual calendar, made in limited numbers for the Big Pilot's Watch Perpetual Calendar from 2006. The calendar advances mechanically and is set through the crown alone, with a four-digit year shown at 7:30 beside the moon phase. Two barrels supply the seven-day reserve. IWC later replaced it in the model with the ceramic-pawled 52000-family calibres.