No other complication has taken centre stage on the dial of the Big Pilot's Watch more often than the perpetual calendar. Developed during the 1980s by IWC's former head-watchmaker Kurt Klaus, the large dial not only lends itself well to the mechanism's many display, but it also makes reading of the calendar information particularly easy. The Big Pilot's Watch Perpetual Calendar features a stainless steel case, a blue dial, rhodium-plated hands and a blue calfskin strap. The perpetual calendar a...