Patek Philippe 5204P-001 represents the pinnacle of grand complication watchmaking, combining a split-seconds chronograph with a perpetual calendar in a platinum case. This model exemplifies the highest level of mechanical sophistication, delivering unparalleled timing capabilities alongside a fully integrated calendar system. The dial is meticulously arranged to maintain clarity, ensuring that each function is both accessible and visually balanced despite the watch’s complexity.

Crafted for elite collectors, the 5204P offers a rare combination of precision, rarity, and prestige. The split-seconds chronograph allows for simultaneous timing events, while the perpetual calendar tracks time with exceptional accuracy across decades. Its platinum construction adds both weight and exclusivity, reinforcing its position among the most desirable references in Patek Philippe’s lineup. As a long-term investment piece, the 5204P continues to stand as a benchmark in high-end horology.

Patek Philippe Split-Seconds Chronograph Perpetual Calendar Ref. 5204P-001

Model: Split-Seconds Chronograph Perpetual Calendar
Reference: 5204P-001
Collection: Grand Complications
Introduced: 2012
Case Material: Platinum
Case Diameter: 40 mm
Case Thickness: Approximately 14 mm
Crystal: Sapphire crystal
Case Back: Interchangeable sapphire-crystal display back and solid platinum case back
Water Resistance: 30 m

Dial: Silvered dial on an 18K gold base, with applied black-oxidized gold baton hour markers and black-oxidized luminous hands; day and month displayed through apertures at 12 o’clock; date hand with integrated moon-phase aperture at 6 o’clock; small seconds at 9 o’clock; instantaneous 30-minute counter at 3 o’clock; leap-year indication at approximately 4:30 and day/night indication at approximately 7:30.

Movement: Patek Philippe Calibre CHR 29-535 PS Q
Movement Type: Manually wound mechanical
Movement Diameter: 32 mm
Movement Thickness: 8.7 mm
Components: 496
Jewels: 34
Frequency: 28,800 semi-oscillations/hour (4 Hz)
Power Reserve: Minimum 65 hours
Balance: Gyromax®
Balance Spring: Breguet
Chronograph Construction: Two column wheels with horizontal clutch
Hallmark: Patek Philippe Seal

Functions: Split-seconds chronograph, instantaneous 30-minute counter, perpetual calendar, day, date, month, leap-year indication, day/night indication, moon phases and small seconds.

Strap: Black alligator leather
Clasp: Platinum Patek Philippe fold-over clasp

Reference Variations: The 5204P family subsequently received 5204P-010 with a revised silvered-opaline dial and white-gold luminous markers, followed by 5204P-011 with an opaline black dial and white-gold luminous markers. The 5204P-001 is specifically the original silvered-dial configuration with black-oxidized gold markers and hands. (Christie’s)

Distinguishing Feature: Ref. 5204P-001 introduced Patek Philippe’s fully in-house CHR 29-535 PS Q split-seconds perpetual-calendar chronograph calibre in 2012, combining manual winding, two column wheels and a horizontal clutch with seven patented innovations, including six relating to the chronograph and one to the split-seconds mechanism.