The Da Vinci Perpetual Calendar in reference IW3750-09 features a sleek White Gold case and a White dial. IWC debuted this perpetual calendar mechanism in their Da Vinci collection back in 1985 with the reference 3570. It quickly gained recognition for its impressive design and price point. This mechanism became a popular choice not just for the Da Vinci line, but also in other IWC watches like the Novecento, GST, Pilot's Chronograph, and JLC's Master Ultra Thin Perpetual. It even formed the foundation for IWC's Grande Complication and the stunning Destriero Scafusia. The watch measures 39 * 14.3mm and has hinged lugs. Various