well u r not suppose to clean coins but I say they are your coins, but if you try 2 sell them u must disclose that they are cleaned, you will have killed their value also, if not clean them if you wish
It looks raised from the picture. I have a similar one, everyone told me PMD on here, LCS said it could be an error, I have kept it until I get a good evaluation.
Soak the coin in some acetone, if its glue it will dissolve. Some say acetone will change the color of some copper coins although i have never had a problem its something to watch out for. You also cannot use nail polish remover as it is scented and not pure, your local paint or hardware store should have it. Remember also to rinse with water after the soak in acetone and i also would recommend soaking for no more than an hour at a time or you will ruin the luster of the coin. There is a fine line between cleaning and preserving a coin. Im in the glue camp as well due to the fact that if this was indeed a brockage or even a strike through the design elements would be disturbed and as i look at the pic provided you can clearly see lincolns ear with some circulation wear suggesting this coin circulated for some time before whatever is on it attached itself. Get back to us if you decide to go through with the acetone bath i can provide you with a link that will walk you through it so you don't ruin the coin?