Momentum Men's 1M-DV84B2B Cyclone Chrono Black Perforated Leather Watch Quality Japanese-quartz movement Chronograph with 12 hour timing range and automatic roll over Solid 316L stainless-steel case with screw back and screw-down crown Heat-tempered, anti-glare Mineral crystal Water resistant to 660 feet (200 M): suitable for recreational scuba diving