Reference 5270, launched in 2011, is heir to several generations of Patek Philippe perpetual calendar chronographs. The Manufacture reinterprets this timepiece in a model featuring an iconic yet original style. The radiance of platinum — the most precious metal of all yet also the hardest to work with — magnifies the timeless design of the case, with its concave bezel, its elegant two-tier lugs and its correction push-pieces that are satin-brushed on the flanks and polished on top. The perpetual calendar displays are harmoniously arranged, with the date indicated by a hand and a moon phase at 6 o’clock, as well as a twin day/month aperture at 12 o’clock, complemented by two round apertures for the day/night indication and the leap-year cycle. Caliber CH 29-535 PS Q is distinguished by its traditional architecture, combined with six patented innovations relating to the chronograph, as well as by its exceptionally thin calendar mechanism.

Laquered green, black-gradient rim, gold applied hour markers. Platinum. Diameter: 41 mm. Height: 12.4 mm. Water-resistant to 30 m. Interchangeable solid and sapphire crystal case backs. Alligator leather with square scales, hand-stitched, shiny black. Fold-over clasp. Perpetual calendar. Chronograph. Central chronograph hand. Instantaneous 30-minute counter. Perpetual Calendar. Day, month, leap year and day/night display in apertures. Date by hand. Moon phases. Seconds subdial. Chronograph. Central chronograph hand and 30-minute counter. Moon phases.

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. Diameter: 32 mm. Thickness: 7 mm. Number of parts: 456. Jewels: 33. Power reserve with the chronograph disengaged: min. 55 hours - max. 65 hours. Balance: Gyromax^®. Frequency: 28,800 semi-oscillations/hour (4 Hz). Balance spring: Breguet. Hallmark: Patek Philippe Seal.