IWC brought us the Da Vinci Perpetual Calendar IW3750-34 in polished Stainless Steel with a sleek Black dial. This timepiece made waves in 1985 as one of the first wristwatches to feature a perpetual calendar mechanism. It quickly gained acclaim and became the most popular choice for not only the Da Vinci collection, but also other IWC watches and models from JLC. The watch comes in a 39mm case with hinged lugs and was available in different metals and dial colors, including options with German, Italian, English, and French markings. The default option was a plexi glass, but a sapphire crystal could be requested. Later versions included a ceramic case and gem-set options. The