The doubled die error originates during die manufacturing, not during the actual coin strike. When the master hub imparts its design into the working die, a slight angular misalignment between the first and second hubbing impression creates a doubled image permanently locked into the die. Every coin subsequently struck by that die carries the doubling.
On 2010 dimes, doubling most often appears on "LIBERTY," "IN GOD WE TRUST," or the date numerals. The diagnostic feature is that true hub doubling produces raised, three-dimensional doubling with clear separation — distinct from the flat, shelf-like appearance of worthless mechanical doubling (also called strike doubling or machine doubling) caused by die movement after striking.
Collector demand for this error on Roosevelt dimes is strong and well-documented. A 2010-P Roosevelt dime graded MS-64 with a confirmed doubled die sold for $835 at Great Collections in 2022 — the highest confirmed sale for any non-proof 2010 dime circulation error. Even circulated examples with visible doubling regularly fetch $100–$300 depending on the clarity of the doubling and the overall grade.
The missing clad layer error occurs during planchet manufacturing, before any coin design is applied. Modern dimes are produced by bonding an outer cupronickel alloy layer (75% copper, 25% nickel) to a pure copper core under high pressure and temperature. When contamination, surface impurities, or insufficient bonding pressure prevents adhesion, one or both outer layers fail to attach properly.
The result is visually dramatic: the affected side shows reddish-orange copper coloration instead of the expected silver-gray surface. Partial missing clad layer errors (one side affected) are more common than full missing clad errors (both sides exposed). A genuine missing clad coin may also weigh slightly less than the standard 2.27 grams — approximately 1.8 grams for a full one-sided missing clad. The edges often show visible layering where the clad has separated.
This is the highest-value error type among regular business strikes for 2010 dimes. A 2010-D Roosevelt dime graded MS-65 with a partial missing reverse clad layer sold for $1,320 at Heritage Auctions in 2015 — one of the two highest confirmed prices for any 2010 dime error. High-grade examples with dramatic copper exposure covering the entire reverse or obverse are exceptionally rare and command the strongest premiums.
Off-center strikes happen when the coin blank (planchet) is not properly centered in the collar die before the striking dies descend. High-speed automated presses feed thousands of planchets per hour, and occasional feeding misalignment allows a planchet to enter the striking chamber slightly — or dramatically — off-position. The result is a design that appears to have been stamped to one side, with a corresponding crescent of blank, unstruck planchet visible on the opposite edge.
Value scales sharply with both the percentage of displacement and whether the date remains visible. A minor 5–10% off-center strike produces a coin that barely looks wrong and brings only $10–$20. At 30–50% displacement, the off-center nature is unmistakable, and these pieces fetch $50–$150 when the date is still visible. The date visibility requirement is critical — an off-center coin without a readable date is essentially worthless to most collectors because it cannot be attributed to a specific year.
The most dramatic examples — 75% or greater off-center with the date fully readable — are genuinely rare survivals. These pieces have sold for several hundred dollars at auction because the striking energy required to partially print a design on a wildly misaligned planchet and still retain a readable date is statistically unlikely to survive in collectable condition. Uncirculated off-center strikes with sharp detail on the struck portion command substantially higher premiums than circulated examples.
A rim cud error forms when a section of the die's edge breaks away during production — a phenomenon called a die break. The break leaves a void in the die's surface. As the die continues to be used (mint operators don't always immediately retire damaged dies), struck planchets fill that void with metal under striking pressure. The result is a raised, featureless blob of metal that extends from the coin's rim inward over the design area, obliterating any features beneath it.
Cuds range from small, barely-visible bumps to large, dramatic protrusions that obscure significant design elements. Larger cuds are substantially more valuable than small ones, and a cud positioned over prominent design elements such as the date, Roosevelt's portrait, or key reverse features attracts the most collector interest. The die break that causes a cud typically worsens with continued use, meaning later strikes from the same die produce progressively larger cuds — creating a die state progression that specialist collectors track.
The highest confirmed sale for any 2010 dime error is a rim cud, demonstrating this error type's collector appeal. A 2010-S clad proof Roosevelt dime with a rim cud error sold for $1,450 at Great Collections in 2012. The proof coin status significantly amplified this result — proof dies are harder, produce fewer coins, and proof coins receive far more collector scrutiny than business strikes, making an error on a proof coin both rarer and more desirable. Regular business-strike rim cuds typically range from $50–$300 depending on size and location.
Die clash errors occur when the obverse and reverse dies strike against each other without a planchet between them — a "dry strike" or clash. The tremendous force involved (tens of thousands of pounds per square inch) causes each die to pick up a mirror-image impression of the opposing die's design. When subsequent planchets are struck by these now-clashed dies, the coins show ghosted, incuse images of the opposing design overlaid on top of the primary design.
On a 2010 Roosevelt dime with a die clash, you might see faint outlines of the torch, olive branch, or oak branch appearing in Roosevelt's portrait field on the obverse — or conversely, faint remnants of "LIBERTY" or "IN GOD WE TRUST" lettering appearing in the reverse fields. The ghost images are raised on the coin (not incused) because they come from the incuse impressions that the dies took from each other. Die clashes that transferred significant design detail are more valuable than faint or minor clashes.
A notable example — a 2010-P Roosevelt dime graded MS-60 with a die clash sold for $490 on eBay in 2020, demonstrating strong market interest even for lower-grade examples when the clash is dramatic. More dramatic die clashes with clear ghosting of multiple design elements regularly command premium prices. Faint or minor die clashes on business strikes typically sell in the $25–$75 range, making them accessible entry-level errors for collectors just starting to explore the 2010 dime series.
