Call me a kill-joy, but unless Gasparro himself wrote that this was an intentional feature, I'm going to have to call self-promotion on this whole 'discovery'. This looks very much like a random die chip on a single die that some -=GENIUS=- promoter convinced others to accept as a rare variety. The reason there are MS66 "Friendly Eagle" dollars without this feature is due to there being multiple dies used to strike these coins, but only one die with this supposed 'contrail' error.
It should be easy enough to see if this 'feature' is present on the original hub either through actual physical examination or photographs of the hub.
It should be easy enough to see if this 'feature' is present on the original hub either through actual physical examination or photographs of the hub.
























