Artificially toned using chemicals or heat, and polished, but the diagnostics from the photos look genuine, I'd still want a guarantee from a TPG
, there are so many good dealers that have multiples of this coin, that it shouldn't be an issue if you really want a nice MS one, to find pretty quickly, Jack Beymer usually keeps a dozen or so on hand, so does Larry Briggs, there are many dealers I would have no problem buying a really rare coin from Raw and sight unseen, with their guarantee, but not off eBay.
David Lawrence has a MS61 up right now, big price difference too, though I realize the auction is not over. eBay Item
"Buy the Book Before You Buy the Coin" - Aaron R. Feldman - "And read it" - Me 2013! ANA
Life Member #3288 in good standing since 1982, EAC Member #6202, NBS Member, 2¢ variety collector.