Reply to Thread

Message:: [QUOTE="SuperDave, post: 2527165, member: 1892"]Quite the opposite; I can't count how many coins with verdigris I've seen in slabs from both. Verdigris generally develops along a broader timeframe than PVC infestation; in fact, one reason we contemplate verdigris removal rather than acting immediately like we do for PVC is, that it moves so slowly there's time to consider whether it's better for the coin to just leave it there. So, although undoubtedly there are examples of verdigris having developed since the slabbing, the majority of them already had the verdigris and were slabbed regardless. You want to see a bummer? Check out some of the "57th Street Collection" coins NGC slabbed when that hoard came to light. A bunch of them had active PVC infection and NGC slabbed them anyway. Over the next few years some of these are going to destroy themselves while sitting in the slab. I suspect that will come back to bite NGC, down the road.[/QUOTE]