The Patek Philippe Annual Calendar Regulator Ref. 5235/50R-001 is a sophisticated timepiece that combines traditional design with modern technology. Housed in a 40.5mm rose gold case, it features a two-tone graphite and ebony black dial with a vertical satin finish. The watch showcases a regulator-style display with a central minute hand, a small hour subdial at 12 o'clock, and a small seconds subdial at 6 o'clock. It also includes an annual calendar with apertures for the day, date, and month. Powered by the in-house Caliber 31-260 REG QA movement, it offers a power reserve of up to 48 hours. The watch is completed with a hand-stitched matte black alligator leather strap and a rose gold buckle.