I'm looking at a 1941 12 ga FWE Field Grade in really high original condition, and noticed a small stamp or engraving on the left side of the frame. Never seen it before, but I can tell you the edges are sharp--you can feel them with your finger. Anybody ever seen this before? The barrels are 28" armor steel with typical NP proof marks, but they also have "US" stamped on each about 6 inches out, so they are still hidden by the forend. No flaming bomb ordinance cartouche that I can see, but I'm wondering if this is some government armory mark. Nothing on the stock either. thanks.[img]https://
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