This Patek is 40.5mm 18K rose gold case, sapphire crystal back, black gradient dial with gold applied hour markers with luminescent coating, self-winding Caliber CH 28-520 C movement with date, chronograph, 60-minute and 12-hour monocounter at 6 o’clock, sweep seconds hand (chronograph hand), approximately 45-55 hours of power reserve, 18K rose gold bracelet Nautilus fold-over clasp. Water resistant to 120 meters.