Recently we found this iron ring and I need help trying to identify what it is. It is crudely made and measures 5 1/2 inch wide, the protrusion sticks up 1 inch, the width is 2 inches. One side of the ring is 1/4 inch and tapers to a sharp edge on the other side. We have found cannon parts in this area at Selma. This ring was found with a 24 pounder CS case shot. It's from the war but I don't know what. Maybe cannon related or wheel part. Any help is appreciated.