The vast majority of copper Stacks 57th St. Hoard pedigreed coins in NGC slabs are environmentally damaged yet problem free on the label. I would avoid them all and just assume they have a problem. Looking at those coins is irritating especially when you send in a coin like this and it comes back cleaned.
In this case I'm glad they didn't remove the verdigris because what's underneath probably looks a lot worse. But yeah, the problem-free slab is a head scratcher given the magnitude of the issue.
That 1887 IHC has the look of being recolored. I don't like it. As far as PCGS and NCG, I've seen some fairly important coins or collections "slide by" into problem free holders. Not surprised.
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