Patek Philippe - Grand Complications Perpetual Calendar Moonphase Chronograph Watch 5270G-018

41mm 18K white gold case, interchangeable full back and sapphire crystal back, silvery-opaline dial with black oxidized gold applied numerals, manually wound Caliber CH 29-535 PS Q movement with chronograph and perpetual calendar, central chronograph hand and instantaneous 30-minute counter, day, month, leap year and day/night indication in apertures, date by hand, moon phases, approximately 55-65 hours of power reserve, hand-stitched matt black alligator strap with with square scales, fold-over buckle. Water resistant to 30 meters.