Author Archives: Ken Potter

Search goes on for errors in copper

Numismatic News reader Howard Sawicki has reported finding a 1983 cent that weighs 3.0 grams. The presumption in a case like this is that it must be copper, something it shouldn’t be because all cents were supposed to have been … Continue reading

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Old errors lurk in your cent change

For the first time in history the United States Mint has put a “P” mintmark on Lincoln cents. While searching change for the new cents from Philadelphia, remember the denomination also has many error coins that can still be found … Continue reading

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Latest copper 1983-D cent a mystery

Numismatic Guaranty Corporation of Sarasota, Fla., authenticated and graded a 1983-D Lincoln cent as being struck on a brass planchet of a composition of 98 percent copper and 2 percent zinc that weighs 3.0 grams. Regular production 1983-D cents should … Continue reading

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Rare 1982-D Small Date copper found

After 34 years, a 1982-D Small Date cent struck on a 95-percent copper-alloy planchet has finally been found and confirmed by me. A Minnesota collector who wishes to remain anonymous discovered it while sorting through 1982 cents by weight to … Continue reading

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1851-D gold $1 has die rotation

Numismatic News reader Jon Bender of Dallas, Texas, came up with an 1851-D gold dollar with approximately 90-degree Rotated Dies. He said, “Never have [I] seen one like this on an 1851[D].” It represents one of few gold coins with … Continue reading

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Reverse proof might not be one

Readers be warned!  If you are offered a 2004 (or any date) silver American Eagle that appears at first glance to be a reverse proof,  it might be a post-mint alteration of a genuine coin. At the Michigan State Numismatic … Continue reading

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Doubled die on Cumberland quarter

Variety hunter Alfonso Lopez has garnered credit for finding the first reported Doubled Die Reverse on a 2016-P Kentucky Cumberland Gap America The Beautiful quarter. The doubling is easily seen with the naked eye (for some of us) or under … Continue reading

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Repunched ‘D’ mintmark on cent

Robert Lawson of Ohio has come up with a fairly major Repunched Mintmark (RPM) variety on a 1948-D Lincoln cent that to the best of my knowledge is unlisted by all the entities that list modern die varieties.  The variety … Continue reading

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Hot Lips found on 1964 dime

Numismatic News reader Michael Dustin has reported the first 1964 Philadelphia Roosevelt dime with a Doubled Die Obverse that I have been able to photograph. The doubling is very similar to the 1964 Denver Mint and 1953-S and 1955-S dimes … Continue reading

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Doubled 1926 dime found

David Sutton of Michigan can lay claim to reporting the first major doubled die known to me on a 1926 Winged Head Liberty dime; often mistakenly referred to as a Mercury dime. It’s certainly not of the stature of the … Continue reading

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