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. Interchangeable full back and sapphire crystal case back. Water-resistant to 30 m. Diameter: 41 mm. Height: 12.4 mm.
STRAP
Alligator leather with square scales, hand-stitched, shiny black. Fold-over clasp