This Patek is 40.5mm 18K rose gold case, sapphire crystal back, screw-down crown, black-brown dial with gold applied hour markers with luminescent coating, self winding caliber CH 28-520 C movement with 60-minute and 12-hour monocounter chronograph and date, approximately 55 hour of power reserve, matt dark brown alligator strap with Nautilus fold-over buckle. Water resistant to 120 meters.