Large Cent Damage?

Don't know but you may want to ask over in the classic coin forum, this is for moderns.

If they all look like that, then you have corrosion problems. That is pretty severe and you would not be able to do much without further damaging the coin.

I took it our of the flip. I doesn't feel slimy (I'm not sure what PVC is) here are better pics:
In This state what is a coins lost value because of the corrosion or what not?

Well, technically it is not PVC, it is the plasticizer used to make PVC soft.

PVC, in its natural state, is a solid; think PVC plumbing pipe. It is just easier to say PVC than it is to say phthalates.

The plasticizers leech out over time. While they can evaporate, become airborne, and redeposit, direct contact (think coin in a PVC flip) will always do the most damage in the least amount of time.

While I am basing this on what I see from the photo (my opinion could change when seeing it in hand), it looks like you have verdigris.

Interesting piece. Are those scratches or die cracks on the OBV? I had some that I have been soaking in mineral oil for awhile now. The verdigris is lifting off using that method but it takes a long time.

Looks to be a metal detector find and yes, that looks to be verdigris. It is definitely considered environmental damage.

Yes, the kind you take to get your bowels back on track. Don't confuse it with mineral spirits in the paint aisle. I learned this trick from the CCF and it works but like I said, it takes a long time depending on how much verdigris there is. When done I wash it off with hot water and air dry.