Patek Philippe Ref. 5270J-001 Perpetual Calendar Chronograph (With Yellow Gold Case and Silvery Opalescent Dial)

A successor of Patek Philippe’s grand 1941 classic (Ref. 1518), the Ref. 5270 Perpetual Calendar Chronograph has been available since 2018 in platinum with a golden opaline dial and a rose-gold version with a gold “goutte” style bracelet.

Now, the manufacture is extending its regular collection of this grand complication in a yellow gold version for the first time.

The silvery opaline dial with applied baton indexes and leaf-shaped hands in yellow gold assures excellent legibility. The displays of the perpetual calendar are tastefully balanced with an analog date at 6 o’clock and a double aperture for the day and month at 12 o’clock. They are complemented with two small round apertures for the day/night indicator and the leap year cycle as well as the typical moon-phase window.

The caliber CH 29-535 PS Q is the first chronograph movement with a perpetual calendar developed in 2011 and crafted entirely by Patek Philippe. It combines traditional architecture (horizontal clutch, column wheel and manual winder) with six patented innovations for the chronograph functions and stands out with its extremely thin calendar mechanism (1.65 mm for 182 parts).

The movement can be admired through the sapphire-crystal case back. A solid back in 18K yellow gold is part of the scope of delivery.

The new Ref. 5270J-001 is worn on a hand-stitched matt chocolate brown alligator strap with large square scales secured with a yellow-gold fold-over clasp. It joins the previous platinum and rose-gold models to accommodate the individual preferences of aficionados of Patek Philippe grand complications.

Technical details

Model: Ref. 5270J-001 Perpetual Calendar Chronograph

Caliber CH 29-535 PS Q
Manually wound mechanical movement, chronograph with column wheel, chronograph hand, instantaneous 30-minute counter and subsidiary seconds
Perpetual calendar with day, month, leap-year cycle and day/night indication in apertures, analog date Moon phases
Diameter: 32 mm
Height: 7 mm (of which 1.65 mm for the perpetual calendar mechanism)
Number of parts: 456 (of which 182 for the perpetual calendar mechanism)
Number of jewels: 33
Power reserve: Min. 55 hours – max. 65 hours with chronograph stopped
Balance: Gyromax®
Frequency: 28,800 semi-oscillations per hour (4 Hz)
Balance spring: Breguet
Balance spring stud: Adjustable

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

Center hour and minute hands
Sweep chronograph hand

Subsidiary dials:
– 30-minute counter between 3 and 4 o’clock
– Subsidiary seconds between 8 and 9 o’clock
– Date at 6 o’clock

Aperture displays:
– Day and month, in-line at 12 o’clock
– Moon phase at 6 o’clock
– Day/night indication between 7 and 8 o’clock
– Leap year cycle between 4 and 5 o’clock

– Day of week between 10 and 11 o’clock
– Month between 12 and 1 o’clock
– Moon phase between 6 and 7 o’clock
– Date between 11 and 12 o’clock
Delivered with correction stylus in ebony and 18K yellow gold

– Chronograph start and stop at 2 o’clock
– Chronograph reset at 4 o’clock

Patek Philippe Seal

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)

18K yellow gold
Sapphire-crystal case back and interchangeable solid back in 18K yellow gold
Water-resistant to 30 meters
Case dimensions: Diameter: 41 mm
Height: 12.4 mm
Width between lugs: 21 mm

Silvery opalescent
12 applied baton markers in 18K yellow gold
Leaf-shaped hour and minute hands in 18K yellow gold
Counterbalanced chronograph hand, arrow-shaped, Pfinodal, yellowgold plated and sandblasted
Subsidiary dials offset, pierced:
– Subsidiary seconds with baton hands in 18K yellow gold
– 30-minute counter with baton hand in 18K yellow gold, sandblasted
– Analog date with baton hand in 18K yellow gold

Hand-stitched alligator leather with large square scales, matt chocolate brown, with fold-over clasp in 18K yellow gold

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