As the reinterpretation of a design icon, the Ref. 5811/1G-001 Nautilus features a case and bracelet in white gold as well as a blue sunburst dial with a black gradation to the periphery. Water-resistant to 120 m and with a slightly enlarged diameter to 41 mm, the watch reflects its affinity with the original Nautilus of 1976 with a two-part case. It also features several subtle technical refinements and patented innovations: a secured fold-over clasp, a new lockable adjustment system, and a new pull-out piece lever system that replaces the split stem. WATCH Self-winding mechanical movement. Caliber 26_330 S C. Date in an aperture. Sweep seconds. DIAL Sunburst blue with black-gradient rim, horizontally embossed, gold applied hour markers with luminescent coating. CASE White gold. Screw-down crown. Sapphire crystal case back. Water-resistant to 120 m. Diameter (10Ð4 oÕclock): 41 mm. Height: 8.2 mm. STRAP White gold. Patented fold-over clasp with lockable adjustment system.