Dear God, why would you put vinegar on a coin? You should never attempt to clean them. No damage here, you have what looks like a copy damaged with a hole.
FRONT Roman general with Roman numerals 111 X
BACK Eagle perched on a limb with a piece of the letter O going over it's left claw followed by M A.
My uncle recently passed it was found in a rusted out trunk in a hidden room in his basement. The room contained items from the original owner of the house back in 1920. My family purchased the house then. Any information you could tell me about it would be greatly appreciated. I did put vinegar on the back side where the eagle is but no



