The Da Vinci Perpetual Calendar from IWC is a true gem. First released in 1985, it revolutionized the watch industry with its innovative perpetual calendar mechanism. This feature has since become a signature of the brand and has been incorporated into various other models, such as the Novecento, GST, Pilot's Chronograph, and even collaborations with JLC. The Da Vinci 3750 boasts a 39mm diamond-set White Gold case and a White dial, with the option for different dial colors and languages. The default plexi glass can be switched for a sapphire crystal upon request, and there are even options for a ceramic or gem-set case. Its successor, the 3758, was introduced in