The IWC Da Vinci Perpetual Calendar in reference IW9253-08 boasts a luxurious 18-karat yellow gold case adorned with diamonds, and a dial paved with sparkling diamonds and accented with ruby hour markers. This innovative perpetual calendar mechanism was first introduced by IWC in the 1985 Da Vinci reference 3570, causing a wave of excitement in the watch industry. It has since been widely used in IWC's other collections, as well as in models by JLC. The 39 * 14.3mm case of the Da Vinci Perpetual 3750 features hinged lugs and was available in various metals and dial colors. The default option was plexiglass, but sapphire crystal could