http://shop.ebay.com/?_from=R40&_tr...ace+dollar+ms63+ngc&_sacat=See-All-Categories and another one http://cgi.ebay.com/Toned-1921-P-NG...80?pt=Coins_US_Individual&hash=item19c27a8e84 This one says its a Morgan on the slab itself.
The first is a link to an ebay store with 76 items, so I'm not sure what you're referring to. The second link is to an older NGC holder, they used to write out Morgan on the slab, nothing out of the ordinary. * Oops, missed the title in the auctions. Just looks like the seller is a little confused, or it's a typo.
