Nixon Men's '51-30 Chrono' Quartz Stainless Steel and Leather Watch, Color:Brown (Model: A124-2301-00) Handsome, easy-to-read 51 mm design that launched the oversized trend, with 3 CD textured sub dials 6-hand chrono, date window, 24-hour and seconds sub dials, custom-molded hands with luminous fill Japanese-quartz Movement Case Diameter: 51mm Water Resistant 200m (660ft):in General, Suitable for Professional Marine Activity and Serious Surface Water Sports, but not Diving