The Navigator Class of Wristwatches, developed in collaboration with Kelly Air Force Base in 1986, is a significant milestone in timekeeping technology. More than just an accessory, this high-impact composite fiber shell case watch is a vital tool for adventurers and professionals alike, reflecting the pursuit of progress and excellence. The Navigator issued today was last revised in 2019 with the addition of a sapphire crystal, steel crown and crystal retaining ring, as well as an easy-access battery hatch. Featuring a high-torque movement, with an EOL (end-of-life) indicator to notify you when it is time to change your battery; tritium tubes at the hour markers as well as on hour and minute hands, to deliver superior legibility, day or night; a 41mm high-impact composite fibreshell case for ultra-light durability; and a 12-hour bi-directional bezel. Movement: ETA High-Torque FØ6 No of Jewels: 3 Scale Quantity: 2 Scale Range: 1-12 (13-24) Calendar Type: N/A Luminous Features: Tritium Gas Tubes Crystal Material: Sapphire Case Finish: Matte Bezel Type: Bi-Directional Bezel Scale: 12 Hour Submersibility: 6 ATM Case Diameter: 41mm Case Thickness: 13mm Lug Width: 20mm