Patek Philippe watch from Nautilus Annual Calendar collection. The premium quality classic men’s Patek Philippe Nautilus Annual Calendar 40.5mm 5726/1A-010 is equipped with a reliable automatic self-winding mechanism (powered by arm amplitude) of PP324S caliber, with the following features: hour, minute and second hands, as well as the 24h display, date, day of the week, moon phase, month. The octagonal case of a 40.5 mm steel watch with a 12 mm height will perfectly complement the look and brighten the wrist of its wearer. For the production of Patek Philippe Nautilus Annual Calendar 40.5mm 5726/1A-010 offered in our online store, use high quality stainless steel 316L (Swiss standard) and sapphire glass high strength, thus providing maximum protection against chipping and mechanical damage. The distinctive feature of this model is a white dial, whose hour indices provide hour markers. The Patek Philippe stainless steel bracelet completes the look with its signature folding clasp. The waterproofness of this model is 30M (WR30) – minimal exposure with water is allowed.