Speaking of longevity, 25 years later, A.W. Downing, the man who altered the die, was sent to New Orleans in February 1900 to assist with a problem they had with dies breaking. You can read his report here.
https://archive.org/details/rg104en...n95/mode/2upI find it quite dubious the notion that the amorphous blob at the top of the N was the deliberate mark of a sting operation. The March 2018 Stack's Bowers auction mentions "conjecture" in the
CherryPickers' Guide that this variety is the same die, but the PCGS marketing blurb dances around who exactly these "numismatic experts" are, that are "generally comfortable in attributing the coins to the Mitchell incident". It seems silly to think that a 76 year old man stealing pennies is going to inspect his proceeds for evidence requiring a magnifying glass to see. I think it's very unlikely that they would release coins into circulation from a deliberately damaged die. I suspect that the real alteration was quite obvious, and that all the coins from that coining press were subsequently destroyed.
Everybody loves a good story, but there's absolutely nothing connecting the variety and the story together.