Marathon 36mm Officer's Quartz w Date (GPQ-D) Nylon DEFSTAN Watch Commonly known as Officer’s Field Watch Quartz (OFQ) or Stainless Steel General Purpose Quartz (GPQ-SS). This variant of the Officer’s Watch houses a Swiss-made, 3-Jewel high-torque quartz movement with an EOL (end-of-life) indicator for monitoring battery life. 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 Crystal Material:   Sapphire Crown Type:   Pressure Case Material:   316L Stainless Steel Case Finish:   Parkerized Bezel Type:   N/A Bezel Scale:   N/A Submersibility:   5 ATM Case Diameter:   39mm Case Thickness:   11mm Lug Width:   16mm