No other brand has the kind of history Patek Philippe does with the Perpetual Calendar Chronograph. From the first serially-produced example in 1941 (Ref. 1518) to the venerable Ref. 2499, considered by many as the greatest wristwatch every made, this is a category that the Swiss brand has dominated for decades. The current line-up includes the Ref. 5270, a descendant of the Ref. 1518, and has been available since 2018 in platinum and rose gold. For the first time, the Ref. 5270 will now be offered in a timeless yellow gold case.

The classic Patek perpetual calendar chronograph layout

The 41 mm yellow gold case has a concave bezel and tiered lugs. Water-resistant to 30 meters, the case is 12.4 mm thick and is fitted with sapphire crystal caseback. The silvery opaline dial is fitted with applied baton indexes and leaf-shaped hands in yellow gold.

Details of the Ref. 5270 dial

The perpetual calendar indications follow the classic layout we have come to expect from this type of watch - an analog date at 6 o'clock and a double aperture for the day and month at 12 o'clock. Two small round apertures for the day/night indicator and the leap year cycle as well as the typical moon-phase window. A tachymeter scale – used to measure speed of moving objects – is placed on the periphery of the dial.

The chrono pushers have brushed sides and case has tiered lugs

The watch is powered by Caliber CH 29-535 PS Q, Patek’s first in-house chronograph movement with a perpetual calendar that was developed in 2011. The manual-winding integrated movement has the traditional column construction and horizontal clutch, it boasts six patented innovations for the chronograph functions and replaced the Nouvelle Lemania-based CH27-70 CH movement that powered its predecessors. The movement has a power reserve of 65 hours and an escapement with a Gyromax balance that oscillates at 4 Hz (28,800 vph).

The magnificent Caliber 29-535-PS-Q handwound movement

The new Ref. 5270J-001 is worn on a hand-stitched matt chocolate brown alligator strap with a yellow-gold fold-over clasp, it is priced at AED 595,000 in the UAE.

ALSO READ: Patek Philippe Ref. 2499: A Brief History of a Classic