Altanus Geneve Men's 'Master Sub' Swiss Automatic Stainless Steel and Polyurethane Casual Watch, Color:Black (Model: 7885N-02) Automatic movement Case diameter: 43 mm Stainless steel case Durable sapphire crystal protects watch from scratches Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving