5990/1A-001 Patek Philippe This Stainless Steel Watch has mechanical self-winding movement. Nautilus Travel Time Chronograph. Chronograph with 60-minute counter. Dual time zone mechanism indicating local and home time. Local and “home” day/night indication in apertures. Local date by hand. Sweep seconds (chronograph hand). Dial: black gradated dial, gold applied hour markers with luminescent coating. Steel bracelet with Nautilus fold-over clasp. Screw-down crown. Sapphire-crystal case back. Water resistant to 120 m. Steel case diameter (10 - 4 o’clock): 40.5 mm 5990/1A-001 Patek Philippe Stainless Steel Watch.