The Big Pilot’s Watch Perpetual Calendar in stainless steel with a blue dial continues the long-standing tradition of perpetual calendar watches in the Big Pilot’s collection. 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 automatically recognizes the different month lengths and the leap years, and will not require a manual adjustment until 2100.