General Purpose Mechanical
SKU : WW194003
  • General Purpose Mechanical
    General Purpose Mechanical

Introducing the new and improved GPM (GPM) watch from Marathon! This new execution incorporates a larger diameter dial opening and a dual wind movement. Also, for the first time the GPM is available in Desert Tan and Sage Green in addition to the standard black.


Designed to be used in the field by infantry or other military personnel and built to the strict military standards of MIL-PRF-46374G, the GPM is just as at home being worn by a civilian as it is in uniform on the battlefield. The GPM is a true all purpose watch that will be your reliable companion for years.


The new GPM uses a Marathon Japanese made “Dual Winding Movement” (DWM) and can be wound both by manually winding the crown or by use of the automatic self-winding rotor (transferred from the energy caused from the movement of the wrist). With our new watch winding system, the user will notice that there is an emission of a mechanical noise and a sensation of the rotor oscillating; reassuring the user that the automatic winding system is performing commendably. Once wound, the GPM will run for approximately 41 hours without the need to be wound again. Thanks to the DWM, wearing the watch re-energizes the movement to run continuously for 41 hours. The new movement has 24 jewels (friction reducing rubies), and comes in at a beat rate of 21,600 beats (ticks) per hour, providing a smooth sweep of the central second hand and high accuracy tolerances.


As the GPM is a field watch, we were able to make the weight as low as 30 grams (without strap) due to fibreshell, which does not sacrifice quality or durability, while keeping weight low. Applied on the dial, minute, and hour hands are self contained Tritium gas filled tubes which ensure a constant glow for maximum low-light visibility. Tritium is a trusted source of illumination for military equipment, from watches to aeronautical displays, firearm sights, and binoculars. Tritium tubes glow on their own without the need for charging by an external light source, and will not fade in brightness making it an ideal configuration for nighttime or low light operation. The GPM is water resistant to 3ATM (30 meters/100 feet), making sure that it will not yield to the elements.


Included with the new GPM is a one piece nylon military strap which is made in accordance with MIL-S-46383B Type II and provides comfort and durability while remaining lightweight. Also available from Marathon are extra nylon straps in various colours to personalize your GPM.


Overall assembly of the watch is performed in La Chaux de Fonds, Switzerland, combining the accuracy of a Marathon designed Japanese movement with reliability and Swiss craftsmanship to bring you a superb watch. The Marathon GPM is a watch that will provide you with years of accuracy, reliability, and enjoyment!









Item Shape




Dial window material type



Display Type




Case material




Case diameter


34 millimeters


Band Material




Band length


Men's Standard


Lug width


16 millimeters




12 millimeters


Lug to Lug


40 millimeters


Band Color




Dial color




Bezel material








Water resistant depth


30 Meters


Warranty type


Manufacturer - 2 Year

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