It is possible to alter a coin inside a slab-there have been cases where people have gassed slabs. However, this is not a case of anyone messing...
Very nice!
Coin 1: MS 65 ...looks mark-free and lustrous Coin 2: AU 58 ....it might be the toning, but I believe I see wear ....as far as what made you go...
Newer holder and fairly mark-free, so I'm at MS 65 ...only the hits on the neck worry me a bit
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