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.

Watch
Manually wound mechanical movement. 
Caliber : CH 29-535 PS Q. 
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.
Dial : Laquered green, black-gradient rim, gold applied hour markers.
Case : Platinum. 
Diameter: 41 mm. 
Height: 12.4 mm. 
Water resistant : 30 m. 
Sapphire crystal case back.
Strap : Alligator leather with square scales, hand-stitched, shiny black. 
Fold-over clasp.
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.