Patek Philippe Men Nautilus Watch. 40.5mm (at 10-4 o’clock) stainless steel case, sapphire crystal back, silvery white dial with gold applied hour markers with luminescent coating, self-winding Caliber 324 S QA LU 24H movement with annual calendar, day, date, month in apertures, moon phases and 24-hour dial, sweep seconds hand, approximately 35-45 hours of power reserve, stainless steel bracelet Nautilus fold-over clasp. Water resistant to 120 meters.