Patek Philippe Nautilus 5726

The Patek Philippe Nautilus 5726A-001 is a steel annual calendar watch measuring 40.5 mm across. The case stands 11.3 mm thick and pairs with a sapphire crystal, including a sapphire case back that shows the movement. Inside is the self-winding calibre 26-330 S QA LU 24H, offering 35 hours of power reserve and driving the day, date and month apertures along with a 24-hour indication. The black dial also carries a moon phase display, with hands and indices treated in luminescent coating for legibility. A screw-down crown protects the movement from moisture and dust. The watch is fitted on a black alligator leather strap with a steel fold-over clasp. Patek Philippe rates the case to 30 metres of water resistance.