could someone tell me what kind of coin this is i found it around 7 1/2 inches down on its side i went over it many many times and it would only pick it up from like south to north and west to eastwasnt a repeatable signal at all i almost passed it over sure glad i didnt the v3i acted like it was a very iffy signal any help as too WHAT KIND OF COIN THIS IS ?IT SAYS 1936 ON THE BACK ALSO ONE PENNY