Author Archives: Ken Potter

Hash marks found on more coins

A tail feather hash mark noted on the San Francisco “no mintmark” bullion coin housed in the 25th anniversary American Eagle set no longer seems unique to the set. The hash mark is also turning up on “no mintmark” San Francisco bullion coins that were struck and released earlier this year to the investor market and also slabbed as San Francisco coins by third-party grading services. Continue reading

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Die crack found on reverse proofs

Numismatic News reader Dan Matsanka reported finding three 2011-P reverse proof silver American Eagles that sport a die crack on the obverse that runs horizontally through the lower portion of Miss Liberty’s gown. Continue reading

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Tail feather mark found

Is there a way to identify a San Francisco Mint silver Eagle that doesn’t have a mintmark on it once it has left the 25th anniversary set? Continue reading

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Collector nabs Eagle errors

Two down, one to go. That sums up California collector Lawrence B. Gratt’s quest to own examples of each of three proof platinum Eagle errors reported earlier this year. The question is will he get that elusive third piece? Continue reading

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Two new clashes

Two interesting die clash errors showed up at the Detroit Coin Show Sept. 29-Oct. 1. The clashes appear on a 2011-P Rutherford B. Hayes Presidential dollar and a 2011-P Olympic quarter. Continue reading

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Second ’66 doubled-die cent found

Longtime Illinois variety coin specialist Rick Carlson has found what appears to be one of the strongest and perhaps one of the rarest Class I doubled die reverse cents known in the Lincoln Memorial cent series. Continue reading

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Errors golden for collectors

From hard to buy gold errors to errors on popular collector coins, this year I had the privilege of seeing many of them at the American Numismatic Association World’s Fair Of Money Aug. 16-20 in suburban Chicago. For a greater part of each day, I spent considerable time sitting behind the Combined Organizations Of Numismatic Error Collectors of America’s club table explaining to folks what kind of errors and varieties they brought for review. I also scrounged the floor to find a few neat errors and varieties to shoot photographs of. Continue reading

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Doubled-ear 1988 cent found

Just when you’d think that everything that was major for a coin over 20 years old had been found, up pops a beautiful 1988 doubled-die cent that almost rivals that of the 1984 cent. The doubling on the 1988 is very strong on the earlobe. Continue reading

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Frosting error found on $50

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

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Black-eyed Grant cause explained

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

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