Invicta Men's 3913NS II Collection Racing Sport Chronograph Watch Precise and high-quality Swiss-quartz movement Scratch-resistant sapphire crystal Case diameter: 43 mm Stainless-steel case; black dial; unidirectional bezel; date function; sub dials for 60 second, 30 minute, and Days of the week Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving