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Author Archives: Ken Potter
The first example of a frosted “Freedom” proof 2007-W $50 platinum American Eagle was reported June 18 as the result of a March 15 article in Numismatic News. Based mainly on this report, which a reader found on the CONECA website that eventually linked him to the full report on the NumisMaster website, I can now state that this error, which is the third size, has finally been found. Continue reading
The black-eyed Grant dollar coin mystery is solved. Reader Richard Stachowski sent in images of a 2011-P Ulysses S. Grant dollar for the June 21 issue of Numismatic News that presented us with a mystery that I thought might be a good-sized die break, or maybe die clash marks below Grant’s right eye. Continue reading
Numismatic News reader Richard Stachowski sent in a 2011-P Ulysses S. Grant dollar that presents us with what appears to be perhaps a good-sized die break or maybe die clash marks below Grant’s right eye. Continue reading
This article was originally printed in Numismatic News. >> Subscribe today! Perhaps the most interesting coins to turn up at my table at the spring Michigan State Numismatic Society convention besides the proof 1962 half dollar I reported in the … Continue reading
A fourth specimen of the elusive 1992 Philadelphia Lincoln cent struck with a “Close AM” (of AMERICA) design style reverse has been reported to this author.
If you happened to buy a proof 2007-W half-ounce platinum American Eagle, now is the time to dig it out and see if it exhibits a die polishing error as the quarter-ounce and ounce coins do. Continue reading
A tripled-die 1892-CC $10 gold piece has been identified by Numismatic Guaranty Corp. Continue reading
David S. Brenner of Delaware found what appeared to be a bona fide strong doubled die on a 2010 Grand Canyon 5-ounce silver bullion coin showing in images he sent to Numismatic News. It wasn’t. Continue reading
In recently discussed many ways to collect errors and varieties, one of which being an assemblage of one of each error-variety type that is possible within a series. I’d like to show more of the types that a collector might want to add to his or her collection. Continue reading