GPM Government Black Mechanical Ref. WW194003BK – Gnomon Watches
Amazon.com: MARATHON 34mm General Purpose Mechanical (GPM) Military Field Watch with Tritium - WW194003 (Desert Tan - No Government Markings) : Clothing, Shoes & Jewelry
Desert Tan General Purpose Mechanical (GPM) - 34mm – Marathon Watch North America
Marathon General Purpose Quartz - The Ultimate Field Watch? - YouTube
Marathon Mechanical General Purpose Field Watch with a sapphire crystal, tritium illumination. #WW194003SS
Marathon 'GPM' General Purpose Mechanical Watch Review | aBlogtoWatch