Patek Philippe 5235G-001 Regulator Annual Calendar – A Distinctive Masterpiece of Precision

The Patek Philippe 5235G-001 Regulator Annual Calendar is one of the most distinctive models in the brand’s modern catalog, standing apart with its regulator-style dial layout and advanced in-house movement. This watch showcases Patek Philippe’s mastery in both horology and design innovation, appealing to collectors who appreciate technical sophistication and unique aesthetics.

Crafted in luxurious 18k white gold, the 5235G-001 features a sleek 40.5 mm case with a slim 10 mm profile, giving it an elegant wrist presence. The polished bezel contrasts beautifully with the satin-brushed case flanks, reflecting Patek Philippe’s meticulous finishing standards. The stepped lugs add refinement, while the sapphire crystal protects the distinctive silvered dial beneath.

The dial itself is vertically satin-brushed and features the rare regulator layout, with the hours displayed on a subdial at 12 o’clock, central minutes, and running seconds at 6 o’clock. Two aperture windows at 10 and 2 o’clock indicate the day and month, with the date elegantly placed at 6 o’clock within the small seconds register. Blue accents on the calendar discs provide a subtle pop of color against the monochromatic background.

Movement – Caliber 31-260 REG QA

Powering this timepiece is the self-winding Patek Philippe caliber 31-260 REG QA, a movement developed specifically for this regulator annual calendar model. This ultra-thin movement incorporates cutting-edge technology, including:

A 22k gold off-center micro-rotor for efficient winding without adding height.

A high-frequency 3.2 Hz (23,040 vph) escapement for improved accuracy.

Silinvar® components in the escapement for enhanced performance and reduced lubrication needs.

An annual calendar mechanism that automatically accounts for months with 30 and 31 days, requiring only one adjustment per year at the end of February.

The movement is beautifully decorated with Côtes de Genève, perlage, and chamfered edges, visible through the sapphire crystal exhibition caseback. It offers a power reserve of approximately 48 hours.

Model: Patek Philippe 5235G-001 Regulator Annual Calendar