Found this on Matagorda Island, Tx. about 3 inches down. I think it maybe an animal tag but I really don't know. Couldn't find any info online. It's cool how the symbols (heart, capital L, and cross) are punched out.
Being a retired auto mechanic I have seen my share of those. It's a carburetor ID tag off an old car. Rochester & Carter carbs use that exact style & shape including the punch outs. Yours broke off at the screw hole..