Marathon Search and Rescue Jumbo Divers Automatic Bilingual Wristwatch JDD Black. Made from 316L surgical grade stainless steel the JDD is a hefty purpose built watch that will not let you down on any adventure you may take it. The glass of the JDD is in fact not glass but a synthetic sapphire which will resist scratches and is coated in an anti reflective coating to ensure maximum dial legibility. The crystal of the JDD is also domed shaped to improve legibility even further. The JDD is made in La Chaux de Fonds Switzerland to guarantee the highest level of quality and accuracy in manufacturing. Inside the JDD is a Swiss made 26 jewel Sellita SW-220 automatic movement the JDD guarantees you a reliable and accurate timekeeping experience. The JDD uses self contained Tritium gas tubes to ensure constant visibility in low light situations a gas tube is placed on each hour marker as well as the hour and minute hands and uses MaraGlo paint for the 12 hour bezel marker. Tritium tubes are self illuminating gas tubes which contain an isotope of hydrogen meaning they will not dull down in brightness like normal photo-luminescent paint which requires an external light source to create a glow. The JDD combines Military toughness with Swiss craftsmanship in a watch that will get the job done and look good doing it. MIL-SPEC: Manufactured in accordance with US Government Specification. Issued and worn by troops in Iraq and Afghanistan. TRITIUM GAS TUBES: Self illuminated 24/7 tritium gas tubes for up to 25 years. SEARCH and RESCUE: Designed for Search And Rescue missions. SWISS MADE: Proudly hand made in La Chaux de Fonds Switzerland since 1939. Uses Sellita SW-220 26 jewels automatic mechanical self-winding movement. DAY/DATE: Features large easy-to-read Day and Date display shown in either English or French. Specifications for Marathon Search and Rescue Jumbo Divers Automatic Bilingual Wristwatch JDD: Manufacturer: Marathon Application: Search and Rescue Gender: Male Dial Color: Black Band/Strap Color: Black Case Color: Silver Case Material: 316L Surgical-Quality Stainless Steel Case Diameter: 46 mm Band/Strap Material: Vulcanized Rubber Wrist Band Type: Strap Movement: ETA Movement 2836 Water Resistant Mark: 1000 ft Country of Origin: Switzerland Age Group: Adults Package Contents: Marathon Search and Rescue Jumbo Divers Automatic Bilingual Wristwatch JDD Marathon WW194021SS-0130: Search and Rescue Jumbo Divers Automatic Bilingual Wristwatch JDD Black