Casio Men's EFX500P-1A Edifice Gold 500 Series Chronograph Watch Precise timekeeping with quality Japanese-quartz movement Amazon.com Exclusive Casio Model Stainless-steel case, date display; scratch-resistant sapphire crystal Chronograph, 1/20 second stopwatch Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving