Patek Philippe - Complications Chronograph Watch 5170G-010

39.4 mm 18K white gold case, sapphire-crystal back, ebony-black opaline dial with gold applied Breguet numerals, caliber CH 29-535 PS manually wound movement with central chronograph hand and 30-minute elapsed time counter, seconds subdial, approximately 65 hours of power reserve, shiny black alligator strap with square scales, fold-over buckle. Water resistant to 30 m.