Marathon 41mm Arctic Edition Large Diver's Quartz (TSAR) Stainless Steel Watch Commonly known as the Tritium Search and Rescue (TSAR). The TSAR is also known as the GSAR Quartz, as it boasts the same capabilities but with a high-torque quartz movement.  The Arctic dial TSAR™ combines military toughness with Swiss craftsmanship. Water-resistant to 30 ATM - 300 meters (1000 feet) and made from 316L surgical grade stainless steel, the TSAR™ delivers precise timing through a 3 jewel ETA F06 high torque quartz movement. Under the scratch-resistant sapphire crystal are self-contained Tritium gas tubes on each hour marker to ensure constant visibility, even in low-light situations. Marathon's Arctic Collection is designed for increased visibility even in extreme environments. These search and rescue, tactical watches are forged to withstand the most severe conditions. Movement: ETA High-Torque FØ6 No of Jewels: 3 Scale Quantity: 2 Scale Range: 1-12 (13-24) Calendar Type: Date Luminous Features: Tritium Gas Tubes and MaraGlo™ Crystal Material: Sapphire Crown Type: Screw-in Case Material: 316L Stainless Steel Case Finish: Brushed Bezel Type: Uni-Directional Bezel Scale: 60 Minute Submersibility: 30 ATM Case Diameter: 41mm Case Thickness: 14mm Lug Width: 20mm