Accutron Men's Automatic Stainless Steel Diving Watch, Color:Silver-Toned (Model: 28C05) Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Antireflective-sapphire crystal Case diameter: 43 mm Stainless-steel case; Black dial; Day-and-date functions; Chronograph functions Water resistant to 660 feet (200 M): suitable for recreational scuba diving