Annual Calendar Regulator 5235 White Gold / Silver

In Context

At 40.5 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. The case back is open, so the movement is visible without taking the watch apart, and the sapphire crystal will resist everything short of deliberate abuse. Rated to 30 m, it is protected against rain and splashes and nothing beyond that.

The movement is hand-wound, so winding it becomes part of the day rather than something the watch does for you. 48 hours of reserve is enough to set it down on Friday evening and find it still running on Monday.

5235G-001 stands on its own in this catalogue — no other reference here shares its base number. It pairs a silver dial with a white gold case. Beyond the time it carries an annual calendar.

Caliber 31-260 REG QA is a self-winding movement developed for Patek Philippe’s regulator-style annual calendar, featuring a central sweep minutes hand with separate subdials for the hours and small seconds. The annual calendar mechanism displays the day, date, and month through apertures and requires correction only once per year, at the end of February. The movement measures 33 mm in diameter and 5.08 mm in thickness and comprises 313 components, including 31 jewels. It operates at a frequency of 23,040 semi-oscillations per hour (3.2 Hz) and delivers a power reserve of approximately 38 to 48 hours. Automatic winding is provided by an off-center 22-carat gold minirotor. Timekeeping regulation is handled by a Gyromax balance paired with a Spiromax balance spring, both produced in Silinvar®. The movement is finished and certified according to the Patek Philippe Seal.

1 other watch in the library runs the Patek Philippe 31-260 REG QA.

Patek Philippe

Annual Calendar Regulator 5235 Rose Gold / Graphite

5235/50R-001 · 40.5 mm