Luminox Men's 0201.BO Sentry 0200 Blackout With Rubber Band Watch Importado Swiss Quartz Movement Sentry Series Swiss-quartz Movement Case Diameter: 43mm Water resistant 200m (660ft):in general, suitable for professional marine activity and serious surface water sports, but not diving Quartz movement Durable mineral crystal protects watch from scratches Case diameter: 43 mm Black ion-plated stainless-steel Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving