Patek Philippe Grand Complications In-Line Perpetual Calendar 5236P-001 self-winding mechanical watch features a 41.3mm platinum case surrounding a blue dial on a blue alligator leather strap with a platinum folding buckle. Functions include hours, minutes, small-seconds, perpetual calendar with day, date, and month; day/night indicator, leap year indicator. This watch is powered by the Manufacture Movement Caliber 31‑260 PS QL. This watch is water-resistant to 30m. This watch comes with interchangeable solid and sapphire casebacks.