Patek Philippe Rose Gold Chronograph Nautilus. Mechanical Self-Winding Movement. Caliber CH 28-520 C. 60-Minute and 12-Hour Monocounter at 6 o'clock. Date in an Aperture. Sweep Seconds Hand (chronograph hand). Gold Applied Hour Markers with Luminescent Coating. Screw-Down Crown. Nautilus Fold-Over Clasp. Sapphire-Crystal Case Back. Water Resistant to 120 m. Available at London Jewelers!