Dime Errors by Year: Pictures, Identification and Values

Which dime errors are worth checking?

Which real coin details should I compare?

How do the normal features, errors and values differ?

Why does the year change the missing-mint-mark test?

The Mercury dime’s Winged Liberty portrait and the Roosevelt dime’s presidential portrait belong to different series. The change in design and the later transition from silver to clad coinage matter before any error test. A normal Philadelphia Mercury dime has no mint mark, and mint marks were intentionally omitted during 1965–1967. A blank area on those coins is not comparable with a later die that should carry a mark.

Sinnock’s Roosevelt dime began in 1946. For ordinary issues dated 1965 onward, clad construction is the normal baseline. The collector Special Mint Set (SMS) issues of 1965–1967 also need their own classification. For broader normal-value context, use the Mercury dime guide or Roosevelt dime guide.

How do I tell a real overdate from damage?

On a 1942/1 Mercury dime, remnants of the underlying date are part of a specific doubled-die variety. Check the whole date, not a single line that happens to resemble a 1. Philadelphia and Denver have separate varieties; the Philadelphia photograph above is not a diagnostic template for every 1942-D dime. An added piece of metal or a damaged digit can imitate an overdate.

A useful photograph has enough context to locate the mark, followed by a sharp detail view. If the date is too worn or altered to match reliable diagnostics, keep the attribution unresolved. Do not clean the date to make a suspected feature “show up.” The same rule applies to the recognized 1966 SMS cheek variety.

Does no P on a 1982 dime mean the same as no mark in 1966?

No. In 1982, the missing expected Philadelphia P is the feature of a recognized issue. By contrast, no mint mark was expected on an ordinary 1966 dime. Start with the date, then compare the correct mark location and attribution. Dirt, wear or an altered surface can obscure a letter, so absence in a photograph is only the beginning of examination.

NGC distinguishes Strong and Weak forms of the 1982 No P issue. Those descriptions concern the recognized varieties, not a license to call any poorly struck or worn dime a missing-P coin.

What is different about a No S Proof dime?

No S Proof dimes are particular collector issues missing a mark expected for their issue. A normal circulation dime from the same year is not converted into a No S Proof by lacking S. Establish the strike category, surfaces and exact date first. A mirrored or polished surface by itself does not prove Proof manufacture.

This distinction prevents one of the most expensive comparison mistakes: applying a rare Proof transaction to an ordinary unmarked circulation dime. A potentially valuable No S Proof needs expert authentication. Keep packaging or provenance when available, but check the coin itself rather than relying on a seller’s label.

Where is the 1966 SMS cheek diagnostic?

The cheek feature belongs to FS-401 on the 1966 SMS issue. Compare its exact outline and position; a stain or scratch elsewhere on Roosevelt’s face is a different observation. The dedicated article provides both sides and a normal SMS comparison.

A named die variety and a random strike error should not share an assumed price. Establish the category before deciding which sale history is relevant.

What do documented dime error sales actually tell me?

Price evidence below was reviewed on November 12, 2026. These examples intentionally span different years, grades and categories. They show why one “dime error price” is misleading. The normal ten-cent face-value baseline applies to a worn modern clad dime without a premium attribution; older silver issues need their metal content and collector factors considered separately.

How can I distinguish an error from post-mint damage?

A reference photograph helps locate a feature; it cannot verify alloy, certify a numerical grade or exclude every alteration. Use the coin grading scale to describe preservation and the appraisal guide to prepare evidence for a credible candidate.

How can I check my coin in three steps?

1. 01Identify Mercury or Roosevelt, read the date and establish normal metal and mint-mark expectations. Separate circulation, SMS and Proof manufacture before testing a missing mark.
2. 02Photograph both sides and the edge, then the suspected diagnostic. Match the exact year and variety. For planchet concerns, record weight and diameter; for a No S claim, establish Proof status rather than surface shine alone.
3. 03Check for filing, removed letters, displaced metal, scratches and polishing. Preserve the surfaces and seek attribution when evidence is incomplete. Compare dated sales only after matching issue, variety, grade and condition.

What should I remember before pricing?

What else do collectors ask?

Which references support these checks?