A tribute to the precision clocks used in watchmaking workshops in the past, this rose gold self-winding Annual Calendar Regulator stands out with its vertical satin-brushed two-tone graphite and ebony black dial. Its high-tech regulating movement incorporates a Pulsomax escapement and a Spiromax balance-spring in Silinvar: two developments from the Patek Philippe Advanced Research department.

Patek Philippe Annual Calendar Regulator 5235/50R-001, Graphite Ebony Black Dial - 18kt Rose Gold on Strap  – A Masterpiece of Contemporary Horology in Rose Gold

Presenting the Patek Philippe 5235/50R-001 Annual Calendar Regulator, a horological marvel that combines avant-garde design with traditional craftsmanship. This reference is a stunning reinterpretation of regulator-style timepieces, housed in luxurious 18K rose gold. It’s a standout piece in Patek Philippe’s complicated collection, blending precision engineering with timeless elegance.

This exceptional model features a two-tone graphite and ebony black dial with vertical satin finishing. The unique regulator layout separates the hour, minute, and seconds displays, offering a clean, legible, and visually compelling structure:

Central minute hand

Subdial at 12 o’clock for hours

Subdial at 6 o’clock for seconds

Day and month windows at 10 and 2 o’clock, respectively

Date aperture at 6 o’clock integrated within the seconds subdial

Encased in a polished and satin-finished 18K rose gold 40.5mm case, it maintains a slender profile at just 10mm thick. The warm tones of the rose gold are perfectly matched with a shiny black hand-stitched alligator strap and a rose gold pin buckle.

Movement

At the heart of the 5235/50R-001 lies the Caliber 31-260 REG QA, a self-winding mechanical movement developed specifically for this regulator display. Key features of this exceptional caliber include:

Micro-rotor architecture for slimness

Annual calendar function (requires only one correction per year in February)

Patented Spiromax balance spring and Pulsomax escapement in Silinvar

Frequency: 23,040 vibrations/hour (3.2 Hz)

Power reserve: Approx 48 hours

The movement is visible through a sapphire crystal caseback and is immaculately finished with Geneva striping and perlage, carrying the Patek Philippe Seal as a hallmark of quality.

CASE SIZE:

40.5mm

CONDITION:

This Timepiece is in Pristine Condition Accompanied with a full Two-Year Warranty from Date of Purchase and a Full Value Appraisal