Patek Philippe Complications Annual Calendar Regulator-Style Display 5235/50R-001 self-winding mechanical watch features a 40.5mm 18k rose gold case surrounding a black dial on a black alligator leather strap with an 18k rose gold tang buckle. Functions include regulator display hours and seconds subdials, sweeping minutes, annual calendar with day, date, and month. This watch is powered by the Manufacture Movement Caliber 31‑260 REG QA. This watch is water-resistant to 30m.