Marathon General Purpose Mechanical with Tritium (GPM)

Mil-Spec: Built according to government specifications for military personnel. Meets NATO stock numbers 6645-00-066-4279 and 6645-01-304-4308. Automatic movement: 24 Jewel NH35 automatic movement. Water resistance: 3 ATM. Tritium gas tubes: Self-illuminating tritium gas tubes glow without needing to be charged by an external light source. Field watch: Designed for general infantry use. Features a lightweight, shock-resistant Fibreshell case and sapphire crystal. Swiss made: Marathon watches have been manufactured in La Chaux-de-Fonds, Switzerland, since 1939.