Iwc, Da Vinci series, model: IW376204, "Kurt Klaus" Perpetual calendar Chronograph watch, is a tribute to Kurt Klaus, the legendary watchmaker of IWC and the inventor of the perpetual calendar. It is limited to 3,000 pieces worldwide. The case measures 43X51MM with lugs, made of stainless steel, featuring gold hands and a white dial. It is equipped with an automatic chronograph movement, integrating three complex functions: perpetual calendar (date / day / month / leap year display), chronograph function, and moon phase display. The dial layout is clear, with a silver base, rose gold hour markers and hands, and a folding clasp. It is an excellent single watch.