Well, there's only so much room on a slab label, and the "damage" is pretty obvious, but there's probably room for an adjective - "Engraved Presentation
Piece" is what I might have called it. I don't know what NGC's criteria are, but I'm not sure I'd call the engraving "post-Mint". It may have indeed
been done outside of the Mint at a local jeweler's shop, but it was likely at the order of, or under the supervision of the coiner and superintendent. But who exactly was J.
Gus. Burt? A reading of the contemporary newspaper account may shed some light.
A search on the Newman Numismatic Portal reveals a second auction appearance of one of these coins in the May 14, 1915 Henry Chapman sale of the collections of the Hon. W.A.P.
Thompson and Rev. Foster Ely, five years after the NGC Eliasberg specimen was sold (for the same price, $1.10, just a dime over face value!) -Editor
By post-mint damage I meant that the message engraved was certainly not part of the original Mint created die. The phrase must have been added after the minting process (though
it may very well have been done on mint premises) ... seems to me that it would be in the same category of “damage” as coins that have been monogramed...