The IWC Da Vinci Perpetual Calendar IW3750-10 boasts a sleek Stainless Steel case and a crisp White dial. This impressive timepiece first debuted in 1985 and quickly gained recognition for its innovative perpetual calendar mechanism. It has since been adapted into various IWC watches, including the Novecento, GST, and Pilot’s Chronograph, as well as models by JLC. The case measures 39mm in diameter and 14.3mm in thickness, with hinged lugs. Different metal and dial options were available, with multi-language markings. Original models had a plexi glass crystal, but later versions could be customized with a sapphire crystal. The 3750 was succeeded by the 375