Patek Philippe Ref. 5370P-011 Split-Seconds Chronograph (with Platinum Case and Blue Grand Feu Enamel Dial)

Since 1923, the split-seconds chronograph occupies a privileged position in Patek Philippe’s wristwatch collection.

The Ref. 5370, the first split-seconds chronograph endowed with the proprietary caliber CHR 29-535 PS was launched in 2015 with a platinum case and black enamel dial. It is one of the most sought-after Patek Philippe watches.

Now, the Geneva brand welcomes a new and finely upgraded version of this watch. This new model boasts a blue Grand Feu enamel dial with glossy finish. Reflecting Patek Philippe’s unmatched expertise in Grand Feu enameling, this lustrous enamel dial in blue was finished by hand on an 18K white gold dial plate.

Patek Philippe Ref. 5370P-011 Split-Seconds Chronograph (with Platinum Case and Blue Grand Feu Enamel Dial)

The dial is also superbly legible. The hours and minutes are tracked by slender leaf-shaped hands with luminous coatings and applied Breguet numerals in white gold. The counter hand contrast as clearly against the blue dial as do the white-printed scales.

Patek Philippe Ref. 5370P-011 Split-Seconds Chronograph (with Platinum Case and Blue Grand Feu Enamel Dial)

The two-phase chronograph movement with two pushers for the chronograph functions and a rattrapante pusher integrated in the crown at 3 o’clock is an impressive example of how tradition meets innovation. The classic elements of the basic architecture are the manual winder, dual-column-wheel control, and the horizontal wheel clutch. This contemporary mechanical movement boasts extensive optimization details and patented innovations as well as an advanced rattrapante mechanism.

Patek Philippe Ref. 5370P-011 Split-Seconds Chronograph (with Platinum Case and Blue Grand Feu Enamel Dial)

The elegant polished platinum case with a concave bezel and satin-finished flank recesses is worn on an alligator strap in shiny night blue secured by a platinum fold-over clasp.

As is the case with all of Patek Philippe’s platinum wristwatches, the new Ref. 5370P-011 is adorned with a small diamond between the lugs at 6 o’clock. It replaces its predecessor with the black enamel dial, presenting a new combination of superb craftsmanship and watchmaking artistry.

Patek Philippe Ref. 5370P-011 Split-Seconds Chronograph (with Platinum Case and Blue Grand Feu Enamel Dial)

Technical details

Model: Ref. 5370P-011 Split-Seconds Chronograph

Movement
Caliber CHR 29-535 PS
Manually wound mechanical movement, split-seconds chronograph with two column wheels, wheel clutch (horizontal), and instantaneous 30-minute counter, sweep chronograph and split-seconds hands, subsidiary seconds
Diameter: 29.6 mm
Height: 7.1 mm
Number of parts: 312
Number of jewels: 34
Power reserve: Min. 65 hours with chronograph stopped
Balance: Gyromax®
Frequency: 28,800 semi-oscillations per hour (4 Hz)
Balance spring: Breguet
Balance spring stud: Adjustable

Functions
Two-position crown:
• Pushed in: To wind the watch
• Pulled out: To set the time

Displays
Center hour and minute hands
Sweep chronograph and split-seconds hands
30-minute counter at 6 o’clock
Subsidiary seconds at 9 o’clock
Pushers: Chronograph start and stop at 2 o’clock
Chronograph reset at 4 o’clock
Rattrapante start and stop at 3 o’clock (pusher integrated in crown)

Hallmark
Patek Philippe Seal

Patents
Optimized toothing profile (No. EP 1437633 – 2009)
Improved precision adjustment of mesh depth (No. EP 1947531 – 2009)
Improved synchronization of clutch brake (No. MPM/DF/15484 CH – 2009)
Piercing of minute-counter cam (No. MPM/DF/15483 CH – 2009)
Self-adjusting hammers (No. MPM/DF/15482 CH – 2009)
Hammers suspended between jewel bearings (No. MPM/DF/15481 CH – 2009)

Case
950 platinum
Sapphire-crystal case back and interchangeable solid platinum back
Flawless rare white Top Wesselton diamond between the lugs at
6 o’clock
Water resistant to 30 meters (3 bar)
Case dimensions: Diameter: 41 mm
Height: 13.56 mm
Width between lugs: 22 mm

Dial
Blue Grand Feu enamel on white gold, glossy finish
Applied Breguet numerals in 18K white gold
Scales for tachymeter and chronograph counter printed white
Leaf-shaped hour and minute hands in 18K white gold with luminous coating
Leaf-shaped subsidiary seconds hand in 18K white gold
Chronograph and split-seconds hands in steel, sandblasted and rhodiumed
Leaf-shaped hand for the 30-minute counter in 18K white gold

Strap
Hand-stitched alligator leather with large square scales, shiny night blue, fold-over clasp in 950 platinum