Author Archives: Ken Potter

Two recent errors head to auction

So what are the values of the unique 1982-D Small Date and 1983-D Lincoln cents struck on solid copper-alloy planchets? Collectors will finally get a chance to find out this August when both coins are put on the auction block … Continue reading

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Collector strikes it rich with ‘No S’

Take a look at your proof sets. One collector who did so had a pleasant surprise and could be $10,000 richer as a result. His story begins just as many other collector stories do. Over 25 year ago a Palm … Continue reading

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New finds on older Lincoln cents

In recent months I’ve been highlighting error-variety finds on rather recent date coins that can still be found in circulation. However, collectors should know that new discoveries are still being made on older coins that are not often encountered in … Continue reading

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Dime series’ doubled dies ignored

A couple weeks ago I started thinking about how ignored the Roosevelt dime series is, in particular the clad series, and it got me to thinking that it is probably chock full of doubled dies that nobody has found based … Continue reading

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Added ‘D’ or second ’82-D small date?

Collectors are checking their cents since January when I wrote about the discovery of the first known 1982-D Small Date Lincoln cent minted on homogeneous copper-alloy planchet. Now after several months, a second specimen may have been found – or … Continue reading

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Hunt on for 1968-S proof half varieties

With the discovery of a 1968-S proof Kennedy half dollar with a standard “Serif S” punched over a “Knob-tailed S” (last used in 1948) announced and certified by Numismatic Guaranty Corporation in the April 18 issue, it is a good … Continue reading

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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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