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I considered that too shathe. Ty. I'm gonna give it an acetone cleanup to see if it still looks like that
np. in my limited experience, acetone doesn't really 'get rid' of the green. it just stops the corrosion process I think (so it's a good idea to do that either way). acetone can remove some gunk, like ink, paint, gum, etc., but it's not magic, unfortunately. LOL, you probably have a ton more experience with that than me though.
on the coin itself, the potential
PMD looks older, like it wasn't done yesterday, but it was done after leaving the mint several years ago... again, not sure though.
also, the parallel lines near the '9' make me think that it was hit by another coin's edge. like another penny. after looking at it again though, the lines run right up to the '5', so I don't think it could be another coin edge that caused that damage... mysterious!