What is a Denticle Impression?

A Denticle Impression (DNI) is a coin variety in the "Die Clash Family" group. It results from an anomaly during die clashing at the United States Mint. Coins exhibiting this error carry distinct diagnostic markers that distinguish them from normal strikes and are actively collected by error and variety specialists.

How does a Denticle Impression occur?

A Denticle Impression occurs due to the obverse and reverse dies striking each other without a planchet between them, transferring design elements from one die onto the other. Once the affected die enters a production run, every coin it strikes carries the same diagnostic markers until the die is retired or replaced.

How do I identify a Denticle Impression?

Look for faint, incuse outlines of the opposite die's design elements in the fields of the coin. Common clash marks include partial lettering or profile outlines appearing where they do not belong. For confirmed Denticle Impression varieties, cross-reference the coin against the NumisDex catalog entry which lists known die markers and attribution details.

Are Denticle Impression coins valuable?

Value depends on the specific die variety, the prominence of the error, the coin's grade, and collector demand. Some Denticle Impression varieties are common and modestly priced, while others — especially early die states or dramatic examples — can command significant premiums. Check recent auction records and price guides for the specific variety.

Where can I find Denticle Impression varieties in the NumisDex catalog?

You can browse all known Denticle Impression varieties on NumisDex by visiting the catalog and filtering by the "Denticle Impression" error type. Each listing includes attribution details, die markers, and images when available.

Denticle Impression (DNI)

A denticle impression is a row of small raised dots or short bars in a coin's field, spaced like the denticles (the toothed border) of a coin. They are marks left in the die face by the denticled border of another die: each tooth dented the die, and every coin struck from it shows the dents as raised marks. On Morgan dollars they are catalogued as VAM varieties, usually named for where they sit ("Denticle Impressions Below Tail Feathers", "Below Wing").

How Does It Happen?

The marks come from one die's border pressing into the face of another, but exactly when that happened is not settled:

An off-center clash in the press: For years, VAM specialists treated these as off-center die clashes, where the dies met without a planchet between them and out of alignment, so the border of one die struck the field of the other. PCGS and Heritage list several as "Denticle Clash."
Contact outside the press: Kevin Flynn's 2013 book on off-center clashed dies notes that more than 40 Morgan dollar varieties had been classified as off-center denticle clashing; of the 19 he examined, he rejected all but one as an off-center clash, because they lack the physical diagnostics of one. That leaves open whether the marks were made in the press or during die making and handling.

Because the cause is disputed, this catalog uses VAMWorld's neutral name, "denticle impression," and files it with the Die Clash family, where the dealers' and grading services' attributions place it.

How to Identify a Denticle Impression

Spacing like denticles: The marks are evenly spaced dots or short bars, matching the pitch of the coin's own border teeth.
In the field, away from the rim: They sit inside the design area, often under the eagle's wing or tail feathers on Morgan dollars, not along the rim.
Raised: They are dents in the die, so they stand up on the coin.
No design transfer: A normal Die Clash transfers the facing design, such as a portrait outline. A denticle impression shows only border teeth.
Not a collar clash: A Collar Clash comes from the collar and sits at the rim.
Not rim "clashed denticles": Denticles that overlap or double at the border are a different feature.

Notable Examples

1878-S Morgan Dollar VAM-17A and VAM-17B

VAMWorld lists both as "Doubled D, Denticle Impressions"; PCGS lists VAM-17A as a "Denticle Clash" and includes it in the Hit List 40. VAM-17A · VAM-17B.

1921 Morgan Dollar VAM-40A

Denticle impressions below the tail feathers, with quadrupled right stars and a tripled or doubled date (VAMWorld). A Hit List 40 VAM. View the listing.

1904-O Morgan Dollar VAM-12A

Denticle impressions below the wing, together with a doubled 9-4 and overlapped reeding. View the listing.

Collecting Tips

Check the attribution: VAMWorld names the location of the impressions; use it to know where to look.
Magnification helps: The dots are small and easily worn. A 5x to 10x loupe and higher grades show them best.
Don't confuse with die chips: A single raised lump is more likely a Die Chip. Denticle impressions come as an evenly spaced row.

Denticle Impression