I found this a while back with an xlt am really curious as to what it might be. I found it about 50 ft from a river in the woods in a town that was started in the early 1700's. Its a little larger and a little heavier than a quarter it seems to be copper,has the color, and a couple spots of green like old copper gets. but there doesnt seem to be any actual markings that i can make out. Here's the pics,sorry bout the quallity.