- Grand Complications
Manual winding

The split-seconds chronograph is one of the three most difficult complications to master, alongside the tourbillon and the minute repeater. It takes a highly sophisticated mechanism to control the two chronograph hands, one of which may be stopped to measure an intermediate or lap time or retain a reference time while the other continues its course unaffected, even by fractions of a second. When released again, the split-seconds hand instantly catches up with the primary hand and the two stacked hands move on together.

Manually wound mechanical movement. Caliber CHR 29‑535 PS. Seconds subdial. Tachymeter scale.
Dial: authentic black enamel, gold applied Breguet numerals. 18K gold dial plates.
Case: platinum. Platinum. Interchangeable full back and sapphire-crystal case back. Water resistant to 30 m. Case diameter: 41 mm. Height: 13.56 mm.
Alligator strap with square scales, hand-stitched, shiny black. Fold-over clasp.
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CHR 29-535 PS
Manual winding

Patek Philippe Caliber CHR 29-535 PS - Front
Front Back

CHR 29-535 PS
Manual winding

Split-Seconds chronograph. 30-minute counter. Seconds subdial. Diameter: 29.6 mm. Height: 7.1 mm. Parts: 312. Jewels: 34. Power reserve: With the chronograph disengaged: min. 55 hours - max. 65 hours. Balance: Gyromax®. Vibrations/hour: 28 800 (4 Hz). Balance spring: Breguet. Hallmark: Patek Philippe Seal.

Savoir faire

Attention to details
What is hand-finishing?

A wide array of fine decorations and subtle enhancements, which enrich the functionality and aesthetics of our pieces, as well as ensuring beauty and precision of a Patek Philippe watch for years to come.

Press release

Patek Philippe Ref. 5370 split-seconds chronograph

For decades, split-seconds chronographs that allow lap times to be measured without interrupting an ongoing event time measurement have ranked among the most coveted Patek Philippe specialties. That was already the case in the 1920s, when the manufacture not only presented its first wristwatch chronometer but added the rattrapante function right from the start. Thus, collectors, aficionados, and enthusiasts of artisanally crafted timekeeping instruments are eager to welcome the new Ref. 5370 split-seconds chronograph. Not least because its elaborate inner life ticks beneath a genuine black enamel dial.

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