Isobrite Naval T100 Tritium Illuminated Watch Mariner Rubber. This watches features a screw-down crown and is rated 300m/990ft perfect for all types of professional and recreational dives. The lightweight unidirectional ceramic bezel is heat-resistant corrosion-resistant and adds richness and luster to the watch. Whether you are looking for a handsome classic dress watch that stands out in the crowd or a functional robust dive watch the Isobrite Naval Series should be at the top of your list. Specifications for Isobrite Naval T100 Tritium Illuminated Watch: Manufacturer: Isobrite Application: Outdoor Casual Travel All Round Gender: Male Battery Type: CR2016 Lithium Case Material: 316L Surgical-Quality Stainless Steel Case Diameter: 44 mm Bezel Finish: Tritium Wrist Band Type: Strap Movement: Swiss Quartz Illumination Type: Tritium Water Resistance Level: Waterproof Water Resistant Mark: 990 ft 300 m 30 atm Additional Features: Lithium Metal Battery Battery Life: up to 10 years Features of Isobrite Naval Series T100 Tritium Illuminated Watch Illumination: 20 x Swiss Made T100 tritium markers Package Contents: Isobrite Naval Series T100 Tritium Illuminated Watch Isobrite ISO1202 Naval Series T100 Tritium Illuminated Watch Mariner Edition - ISO1202