Patek Philippe Grand Complications Perpetual Calendar Chronograph 41mm Platinum Black Dial Ruby Bezel (Ref# 5271/12P-001)

41 mm platinum case with a gem-set bezel, two-tier lugs and a sapphire crystal case back. Bezel and lugs set with 58 baguette-cut rubies, with one further rubie set at 12 o'clock on the dial. Black lacquered dial with applied hour markers, leaf-shaped hands and a tachymeter scale. Manually wound caliber CH 29-535 PS Q, 32 mm in diameter and 7.00 mm thick, beating at 28,800 semi-oscillations per hour (4 Hz) with a Breguet balance spring. Functions: chronograph with central chronograph hand and instantaneous 30-minute counter, perpetual calendar with day, month, leap year and day/night indication in apertures, date by hand, moon phases, and small seconds. Power reserve with the chronograph disengaged of min. 55 hours to max. 65 hours. Black alligator leather strap with a platinum fold-over clasp set with rubies. Water-resistant to 30 metres / 100 feet. Patek Philippe Seal certified. Discontinued by Patek Philippe.