Marathon General Purpose Mechanical Wristwatch w/ Tritium No Government Markings Desert Tan

Marathon General Purpose Mechanical Wristwatch w/ Tritium No Government Markings Desert Tan. The GPM is a true all purpose watch that will be your reliable companion for years. The new GPM uses a 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 energy caused by the movement of the wrist). With our new watch winding system the user will notice that there is a mechanical noise and the rotor can