Anyone know what this is? The dogs dug it up on our property yesterday. It was all messed up from being in the ground so I cleaned it up on the wire wheel and here it is. It's about 2 3/4 inches wide and almost 1/8 inch thick. Kinda big for a coin but I don't know what it is. I think it's made from nickle or possibly silver. Maybe a mix. It's really heavy for it's size. The back side is worn away for the most part. Anyone know what it is?