Patek Philippe Style No: 5270J-001 Patek Philippe Grand Complications Chronograph Perpetual Calendar Watch - Yellow Gold Case - Silvery Opaline Dial

41 mm yellow gold case, 12.4 mm thick, interchangeable full and sapphire-crystal back, silvery opaline dial with gold applied hour markers and tachymeter scale, caliber CH 29-535 PS Q manually wound movement with chronograph, central chronograph hand, instantaneous 30-minute counter, perpetual calendar, day, month, leap year and day/night display in apertures, date by hand, seconds subdial, and moon phases, approximately 55-65 hours of power reserve, matte chocolate brown alligator strap, fold-over buckle. Water resistant to 30 m.