Authentic Patek Philippe Nautilus watch model 5726A-001. Features a stainless steel case and a calfskin alligator leather strap equipped with a deployment clasp. Includes a screwed-down stainless steel bezel, black dial face, automatic self-winding mechanical movement, scratch-resistant sapphire crystal glass front, transparent screw-in case back, 120-meter or 400-foot water resistance, and comes with a two-year WatchMaxx warranty.