Invicta Men's 'Bolt' Quartz Stainless Steel and Silicone Casual Watch, Color:Black (Model: 21349) 50mm Case Diameter Chronograph with 30 minute, 60 second and day sub dials and date display , screw down crown, black rubber band Quartz Movement Water resistant 200m (660ft):in general, suitable for professional marine activity and serious surface water sports, but not diving