SEIKO PROSPEX Diver's 200M "Samurai" Black Dial SRPB51K1 Automatic winding type with manual winding mechanism Cal. 4R35 Movement, 23 Jewels, date display. Power reserve: approximately 41 hours Second hand halts mechanism (Hacking) Wet-suit extension Buckle. Case size 43.8 mm. Water resistance upto 200m.