40mm stainless steel case, sapphire crystal back, embossed black dial, self-winding caliber 324 S C movement with date, with approximately 45 hours of power reserve. Tropical composite black strap with fold-over buckle. Water-resistant up to 120 meters. The Patek Philippe Nautilus 5167A-001 features a stainless steel case and a 'tropic' style rubber strap. It is powered by the self-winding caliber 324 S C. Reference 5167/1A-001 is similar yet fitted with a stainless steel bracelet.