The verdigris has eaten well into the surface and there will be unsightly pitting if and when it is removed. I'd just soak it in acetone to try and neutralize the verdigris and not waste too much time on this coin.
Good/Very Good Details - Environmental Damage. This coin has very little value in the condition it is in and no amount of treatment/conservation will change that.
Good/Very Good Details - Environmental Damage. This coin has very little value in the condition it is in and no amount of treatment/conservation will change that.
ANA #R3154474




















