The Complete 1991 Dime Value Guide

Off-center strikes occur when a planchet feeds into the dies at an incorrect angle or position, so the hub impression does not fall centered on the blank. During 1991's high-volume production runs at both Philadelphia and Denver, high press speeds occasionally caused planchets to shift between the collar and the dies before the strike delivered, leaving one side of the coin blank.

Visually, you will see Roosevelt's portrait and inscriptions noticeably shifted toward one side of the coin, with a crescent of blank copper-nickel planchet exposed on the opposite side. The most desirable examples show a 10%–50% off-center shift with the full date still visible — complete date visibility is the single most important value factor collectors evaluate.

Strike degree and date visibility drive the premium. A 5%–10% shift fetches $30–$60; a dramatic 40%–50% off-center with full date present has sold for $185 or more at Heritage Auctions in MS63 condition. Coins struck more than 50% off-center usually lose the date, reducing collector interest significantly.

The missing clad layer error originates in the planchet manufacturing process, before the coin is ever struck. Modern clad dimes consist of a pure copper core bonded between two outer copper-nickel layers. When temperature fluctuations, metal impurities, or improper bonding pressure prevent one of those outer layers from adhering, the planchet enters production with one side exposed as raw copper.

The result is immediately visible: one face of the coin will appear copper-red (the exposed core) while the other side retains its normal silver-gray clad surface. The design is struck normally on both faces — the missing layer is purely a planchet defect, not a die error. You can also verify the error by weight: standard 1991 dimes weigh 2.27 grams; a single missing clad layer reduces that to approximately 1.8–2.0 grams on a standard gram scale.

Collectors prize this error for its dramatic visual impact and the fact that it cannot be faked without altering weight. Single missing clad layer dimes typically sell for $75–$300 depending on condition, certification, and whether the obverse or reverse layer is missing. Dual missing clad layer examples — copper-colored on both sides — are extremely rare across the entire Roosevelt series and command multiples of the single-layer price.

Broadstrikes occur when the retaining collar — the steel ring that constrains a planchet during striking and forms the reeded edge — fails to engage before the dies come together. Without collar containment, the striking pressure causes the metal to spread outward in all directions, producing a coin that is wider and thinner than the standard 17.91mm specification. During 1991's high-volume production, collar mechanisms occasionally failed to engage in time during rapid press cycling.

Identification is straightforward: the design appears complete and normally detailed, but the coin lacks a defined rim and the reeded edge is absent. Instead, the coin tapers into a flat, sharp edge all around. The diameter will measure noticeably wider than 17.91mm — typically 18.5mm to 20mm depending on how far the metal spread. The weight remains close to 2.27 grams because no metal is lost, only redistributed.

Broadstrikes are among the most visually dramatic of the mechanical errors because they fundamentally alter the coin's shape while preserving the full design. Uncertified examples in decent condition typically sell in the $20–$40 range; professionally graded specimens in MS63 or better can reach $60–$80. The error's value is driven mainly by the completeness of the design and the degree of collar failure visible on the edge.

Die cracks form when metal fatigue causes fracture lines to develop in the hardened steel dies used at the mint. As dies are used for millions of strikes in high-volume production years like 1991, the repeated stress eventually causes hairline fractures. Metal from the planchet is pressed into these cracks during striking, creating a raised line on the coin's surface — the inverse of the crack in the die.

When a piece of die steel breaks off entirely at the rim — a larger failure called a die chip or cud — the resulting coin shows a raised, featureless blob of metal projecting from the rim or into the design. Rim cuds are the most desirable because they represent a larger and more dramatic die failure. The raised metal is unmistakable under a 10× loupe: a smooth, rounded bulge with no design detail, sitting where the die piece was missing.

Value depends heavily on size and position. Minor die cracks through open field areas typically add $15–$30 to a coin's value. Significant die cracks crossing major design elements (through the portrait, date, or torch) are worth $30–$75. Rim cuds affecting a large area — especially those encroaching on the portrait — are the most desirable and can exceed $150 in grades above MS63. Any cud coin benefits dramatically from certification by PCGS or NGC.

Clipped planchet errors occur during the blanking stage of coin production, before the planchet ever reaches the dies. A large strip of metal is fed through a blanking press that punches out circular coin blanks in sequence. When the strip fails to advance far enough between punches, the next punch overlaps a previously punched hole, cutting a curved section from the new blank. This produces a planchet — and ultimately a struck coin — with a smooth curved notch missing from the rim.

The clip can occur on either the obverse or reverse side, and multiple clips on a single coin are possible though rare. Curved clips (the most common type) are distinguished from straight clips — straight clips occur near the beginning or end of the metal strip and have a flat edge rather than a curved one. Under a 10× loupe, the Blakesley effect is a valuable diagnostic: the rim directly opposite the clip will be weak or missing because the metal had nowhere to flow during upsetting, confirming a genuine clip rather than post-mint damage.

The size of the clip directly drives value — small clips under 10% of the coin's diameter are common and worth $15–$25. Larger clips removing 20%–40% of the rim, especially with the Blakesley effect clearly visible and the date fully readable, can bring $40–$75 in grades of MS63 or better. Multiple-clipped examples are notably scarcer and command additional premiums from specialists who focus on planchet errors.