I came across these the other day and my first thought was Pewter, but now I am not 100% sure. The only markings are the USCO stamp on each of the ingots and the 22 written on the bottom of the ingots. There are three ingots cast together to form one large ingot ~3' long. It isn't soft enough to shave a piece off with a knife and I haven't attempted a melting test on it yet. The surface is quite pitted on the top but fairly smooth on the bottom except the few blow out areas shown in the photos. Anybody have any ideas?
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