Dime Error Coins

Dimes are the smallest U.S. coin in circulation, but the errors they produce can be among the most dramatic in American numismatics. From the famous 1982 no mint mark Roosevelt — a coin so significant it caused a national coin hunt — to missing clad layers that expose the pure copper core, dime errors offer collectors an accessible entry point and real upside potential. A discerning eye and a basic loupe are all you need to start hunting.

Most Valuable Dime Error Types

Dimes are clad coins (since 1965) and solid silver before that, which creates two distinct error categories: clad-layer errors unique to post-1964 issues, and the full range of die and mechanical errors spanning both eras.

Featured Dime Errors

1982 No Mint Mark Roosevelt Dime

$75 – $300+

In 1982, the Philadelphia Mint accidentally shipped dies to the presses without adding the required P mint mark — the only time this happened after P marks became standard in 1980. Hundreds of thousands entered circulation before the error was caught.

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Missing Clad Layer Roosevelt Dime

$50 – $400+

When the copper-nickel outer layer was omitted during planchet manufacturing, the result is a dime with a distinctly different color on one or both sides — exposing the pure copper core underneath the normal silver-colored surface.

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Mercury Dime Doubled Die Varieties

$100 – $3,000+

Several Mercury Dime dates exhibit strong doubling — most notably on the date, LIBERTY, and the fasces on the reverse. The 1942/41 overdate is the series' most famous variety, where the underlying 41 is visible beneath the 42.

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Dime on Wrong Planchet

$100 – $2,000+

When dime dies strike cent or cent dies strike dime planchets, the result is dramatically off-size. A dime die striking a cent planchet produces a copper-colored "dime" — immediately recognizable and highly collectible as a major error type.

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The 1982 No Mint Mark Roosevelt Dime

The 1982 no mint mark Roosevelt dime is the most famous modern dime error and one of the most widely collected error coins of the 20th century. The story begins with a procedural lapse at the Philadelphia Mint: after Congress mandated the P mint mark on all Philadelphia coinage in 1980 (except cents), the mark was punched into working dies as part of the normal preparation process. In 1982, at least one set of dies for the dime was shipped to the production floor without the P mark — an oversight that wasn't caught until the affected coins had already entered circulation.

The exact number of no-P dimes produced is unknown, but estimates range from several hundred thousand to over a million. This means they're genuinely findable — not extreme rarities — which is part of their appeal. Coin roll searching through dimes from the 1982 era still occasionally turns one up. In circulated condition, these typically trade for $75–$100. Choice uncirculated examples (MS-65 and above) bring $200–$300, and fully struck gems can exceed those figures at auction.

How to Find Dime Errors in Circulation

Dimes are excellent roll-searching targets because of their small size and high mintage volumes — meaning errors are produced in quantity, even if the percentage remains small. Start by requesting 1982 dime rolls from your bank and searching for the no-P variety. Examine each coin under a 5x loupe and check the area above Roosevelt's shoulder for the mint mark. This alone can make a search worthwhile.

For missing clad layer dimes, look for coins with an obviously copper or bi-colored appearance. A partial missing clad layer will show a section of copper-colored metal on an otherwise normal-appearing coin. Full missing clad layer examples are rarer and dramatically more striking — one side will be entirely copper-toned.

When hunting for doubled dies, focus on the date and LIBERTY on the obverse. Even minor doubling can add significant value on key dates. A basic 10x loupe and a good printed variety reference are your best tools for this type of search.