Marathon Arctic Steel Navigator Automatic Unisex Watches 41mm Sapphire 3-Piece Rubber Strap Kit Black. Equipped with Swiss-precision and reliability the Arctic SSNAV Auto was developed for pilots and everyday adventurerswith a white dial for increased visibility during daylight operations. The watch represents the continued lineage of Marathons original Steel Navigator developed in partnership with the Kelly Air Force Base in 1986. Specifications for Marathon Arctic Steel Navigator Automatic Unisex Watches: Manufacturer: Marathon Size: 11 in Application: Watch Repair/Jewelry Sewing/Textile Gender: Unisex Band/Strap Color: Black Case Color: Steel Case Finish: Parkerized Case Material: 316L Stainless Steel Case Diameter: 41 mm Bezel Finish: Parkerized Wrist Band Type: Strap Movement: Swiss Automatic Illumination Type: Tritium Water Resistant Mark: 10 atm Features of Marathon Arctic Steel Navigator Automatic Unisex Watches RE-ENGINEERED FOR PREMIUM PERFORMANCE - A direct descendant of Marathons original Steel Navigator developed in the 1980s the 41mm Steel Navigator (SSNAV) includes many upgrades inside and out. ULTIMATE ACCURACY - Now the most precise timepieces in the Marathon electric watch lineup the Steel Navigator Series features an accuracy of 10s/year operating at 32768 Hz. This is made possible by the combination of ETAs venerable quartz technology as well as customizations specifically for Marathon. A MARATHON LEGACY - The design for Marathon's Steel Navigator can be traced all the way back to its initial release in 1986. Designed by Jean Maurice Huguenin (current Chief Watchmaker at Marathon) and Leon Wein (father of current Marathon President Mitchell Wein) the original issue of the Steel Navigator was built specifically for - and in partnership with - Kelly Air Force Base. Package Contents: Marathon Arctic Steel Navigator Automatic Unisex Watches Marathon WW194029SS-0530: Arctic Steel Navigator Automatic Unisex Watches 41mm Sapphire 3-Piece Rubber Strap Kit Black