MRK SuperTitanium case (7 times more wear-resistant than normal titanium) with screw-tight crowns and pushers. MRK SuperTitanium bracelet with safety closure and "sliding" system for wearing over the suit. Unidirectional rotating bezel. Case diameter 46 mm. Mineral glass with anti-reflective treatment. Screw-locked bottom. Eco Drive movement (light-powered) with a 330-day power reserve. Power reserve indicator on the dial. WR 20 bar. Functions: depth gauge from 1 to 70 meters with memory of the maximum depth reached. Rapid ascent alarm