Patek Philippe Annual Calendar Regulator 5235G-001 H4VXH0 This watch has never been sized or worn. This watch comes complete with the original Patek Philippe packaging, manual, and papers of origin. The papers are named and dated August 2017.

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Patek Philippe Annual Calendar Regulator 5235G-001 Annual Calendar Regulator contains the new 31-260 REG QA. Though based on the classic micro rotor cal. 240, the new 31-260 movement is vastly reworked. It is the first new Patek caliber to designed to use the Spiromax hairspring and Pulsomax escape wheel and anchor, which are etched from silicon. In addition to the silicium parts, the new movement has some interesting features. Most notably it beats at 3.4 Hz or 23,040 bph, which allows for a better rate. Alongside that Patek has also increased the power reserve to 60 hours (vs 48 hours for the 240) and installed a gear train with new teeth profiles on the wheels for better energy transmission. The new caliber is 5.08 mm high and 33 mm wide, while the watch itself is 40.5 mm in diameter and a slim 10.65 mm high.