Just got this yesterday. It is corroded with green stuff. I tried to soak it in acetone and it got some of it off, but unless someone has a trick up their sleeve, I think it is beyond my realm of repair. Still a really neat coin. Other than the corrosion, it probably is Unc.
I suggest you get out acetone again, soak a qtip in it, and roll it back and forth over the areas that still has the green crap. BTW,,, green crap may equal PVC contamination.