Vintage Prismatic WW2 Era Military Compass for artillery, tank, & mortar gunnery $148.37 USD Sold on: 2017-May-24 Marketplace: eBay 1 Treasure 0 Trash 100% Detail: Description This is a prismatic WWII military compass used for artillery, tank, and mortar gunnery. It is marked in mil-radians or “mils”. There are 2 PI radians in a circle. Divide each radian in... More Relevance Historical Items
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