The IWC Da Vinci Perpetual Calendar is a hallmark of IWC's technical prowess, first introduced in 1985. It was groundbreaking for its time, featuring a perpetual calendar that requires no adjustment until 2499. The watch showcases IWC's 79261 caliber, offering functions such as the date, day, month, year, moonphase, and a chronograph. Available in gold or stainless steel, this model embodies elegance and mechanical complexity.