Patek Philippe Style No: 5271/11P-010 Patek Philippe Grand Complications - Chronograph - Perpetual Calendar - 41 mm Platinum Case - Blue Black-Gradient Rim Dial

platinum case, 41 mm thick, interchangeable solid and sapphire crystal back, bezel and lugs set with 58 baguette-cut sapphires, lacquered blue with black-gradient rim dial with gold applied hour markers, Caliber CH 29-535 PS Q manually wound mechanical movement with chronograph, central chronograph hand, instantaneous 30-minute counter, perpetual calendar, day, month, leap year and day/night indication in apertures, date by hand, moon phases, small seconds, shiny black alligator leather strap with square scales, fold-over buckle. Water resistant to 30 m.