Pre-Owned Patek Philippe In-Line Perpetual Calendar Ref. 5236P

The Patek Philippe Ref. 5236P is an In-Line Perpetual Calendar in platinum, pairing a single-aperture day, date, and month display at 12 o'clock with the self-winding Calibre 31-260 PS QL. Introduced in 2021, the 5236P-001 was the first Patek Philippe wristwatch to arrange the complete day-date-month perpetual calendar on one horizontal line. Its display uses four coplanar discs, with separate discs for the day and month and two for the date. Patek Philippe filed three patent applications covering the coplanar display on ball bearings, safeguards against double jumps and shocks, and the change from the 31st to the 1st. The original 5236P-001 combined a vertically satin-brushed blue dial with a black-gradient rim and a shiny navy-blue alligator strap. In 2024, the 5236P-010 brought a vintage-inspired rose-gilt opaline, or salmon, dial and chocolate-brown alligator strap. The 5236P-011 followed in 2026 with a vertically satin-finished silvery dial, black-gradient rim, and charcoal-gray composite strap with a fabric pattern. All retain the 41.3 mm platinum case and Calibre 31-260 PS QL. The movement has 503 parts, 55 jewels, a 4 Hz frequency, and a stated power reserve of 38 to 48 hours. Every pre-owned example available through The 1916 Company is authenticated and backed by The 1916 Company's 2-year warranty.