IWC Big Pilot’s Watch Perpetual Calendar IW503605

The timepiece with a stainless steel case and a blue dial continues the long-standing tradition of perpetual calendar watches in the Big Pilot’s collection. Developed in the 1980s by Kurt Klaus, IWC’s legendary perpetual calendar automatically recognises different month lengths and leap years. Featuring a Pellaton winding system fitted with ceramic components, the IWC-manufactured 52615 calibre is visible through the sapphire glass back.