Most Famous
Full Bands (FB) / Full Torch (FT) Designation
$250 – $1,000+
The Full Bands designation is not a mint error in the traditional sense — it is a strike quality designation awarded by PCGS (FB) and NGC (FT) to Roosevelt dimes where the horizontal bands on the reverse torch show complete separation. For 1971 dimes, it represents one of the most dramatic value differentials in the entire modern U.S. series. The Philadelphia Mint, in particular, was notorious for producing weakly struck dimes that year, making properly struck examples genuinely rare.
To qualify, both the upper and lower pairs of horizontal bands on the torch must show full, uninterrupted separation — a clear recessed line between each band. Under PCGS rules, the coin must grade MS60 or better and show no significant cuts or marks crossing the horizontal bands. NGC's Full Torch (FT) additionally requires that the vertical torch lines be well-defined. Most 1971 dimes, even high-grade survivors, fail this test.
Collector demand for FB/FT Roosevelt dimes has grown steadily since PCGS introduced full-bands pricing in 2003. The 1971 Philadelphia FB is considered a genuine condition rarity at any grade above MS64. A 1971-D graded MS67FB sold for $999 at Heritage Auctions in January 2017 (PCGS #85140). The number of FB-designated 1971 coins certified by PCGS remains under a few hundred across all mints combined, fueling ongoing premium pricing.
Most Valuable Error
Missing Clad Layer Error
$50 – $300+
The missing clad layer error occurs when the outer copper-nickel layer of the coin's planchet — which normally bonds to a pure copper core — either fails to adhere or separates before or during the striking process. The result is a coin where one or both sides appear bright copper-red rather than the expected silvery-gray clad appearance. This error happens at the planchet preparation stage and is entirely distinct from damage that might occur after striking.
Visually, a genuine missing clad layer coin will show an even, uniform copper-red surface on the affected side, with the design strike appearing normal in relief. The reverse side (if the clad is present there) will look like a standard dime. The coin will also be noticeably lighter in weight — a genuine clad dime weighs 2.27 grams; a coin missing one layer will weigh measurably less. A coin showing a patchy, uneven copper appearance is more likely environmental damage than a true missing clad layer.
Missing clad layer errors on 1971 dimes command meaningful premiums because they are genuine mint mistakes that survived quality control. Value depends on whether one side (single missing layer) or both sides (double missing layer) are affected — double missing layer coins are far rarer and more sought after. Grade and visual impact also influence final price significantly, with dramatic, well-struck examples in higher condition bringing the top end of the range.
Die Variety
1971-D Repunched Mintmark FS-501
$15 – $100+
The 1971-D Repunched Mintmark (RPM) FS-501 is a recognized die variety documented in the Cherrypickers' Guide to Rare Die Varieties. In the era before the U.S. Mint switched to hub-punched mint marks (which happened in 1990), mint mark letters were individually hand-punched into each working die. When a punch was applied at a slightly different angle, position, or depth than the first punch, a secondary impression was left in the die steel, which then appeared as a raised "ghost" on every coin struck from that die.
On the FS-501 variety, examination of the "D" mint mark above the date reveals a secondary D impression at a displaced position relative to the primary. The diagnostic is visible under a 10× loupe as a partial or doubled outline on one or more sides of the D letter. This feature was reproduced identically on every coin struck from the affected working die, making it a true collectible variety rather than a one-off error. The Cherrypickers' designation FS-501 confirms it is the primary (strongest) known RPM for this date and mint.
The 1971-D RPM FS-501 carries a modest but consistent premium over a standard 1971-D in Mint State grades, particularly among Roosevelt dime variety collectors who pursue the Cherrypickers' Guide series. Its collectibility is supported by its listed status in the main reference for U.S. die varieties. Premium increases notably for examples combined with Full Bands designation, though such pieces are very scarce and infrequently offered at auction.
Best Kept Secret
Off-Center Strike Error
$20 – $200+
An off-center strike occurs when the blank planchet is not properly centered between the dies at the moment of striking. The result is a coin where the design is displaced to one side, leaving a curved, blank area of unstruck metal on the opposite side. The degree of off-centering is measured as a percentage — a 10% off-center coin has only a small portion of blank planchet visible, while a 50% off-center coin shows half the design and half blank metal, with the date often visible only at the very edge.
For 1971 dimes, the most collectible off-center strikes are those where the date (1971) is still fully readable, since the date is required to confirm the year. A dramatic off-center — 40% to 60% off — with the full date still visible represents the sweet spot for collector demand. The coin's overall strike quality, surface preservation, and whether any mint mark is visible (for D-mint coins) also influence the premium. Lesser off-center strikes (under 10%) command only modest premiums.
Off-center strikes on Roosevelt dimes are genuine mint errors that escaped quality control at the press and at subsequent inspection stages. Unlike die varieties, each off-center coin is unique — no two are struck with exactly the same displacement angle or percentage. This uniqueness appeals to error coin specialists. Values climb sharply as the percentage of off-centering increases, provided the date remains legible, and even higher for examples in problem-free Mint State condition.
Sleeper
Clipped Planchet Error
$10 – $75+
A clipped planchet error occurs during the blank-cutting stage of coin production. When the machine that punches circular blanks from a metal strip overlaps with a hole previously punched in the same strip, the resulting blank is missing a curved (crescent-shaped) piece from its edge. This defective blank is then struck normally, producing a coin with a characteristic curved notch cut into its rim. Straight clips (from the end of the metal strip) and ragged clips (irregular shapes) also exist but are less common than curved clips on 1971 dimes.
A genuine curved clip on a 1971 Roosevelt dime is accompanied by a diagnostic feature called the Blakesley effect: the coin's design directly opposite the clip will appear weakly struck or even unstruck, because the missing metal cannot provide resistance against the die at that point. This distinguishes genuine clip errors from post-mint damage (grinding or filing of the edge) — damaged coins lack the Blakesley effect and often show tool marks or abnormal metal flow at the edge.
Clipped planchet errors on Roosevelt dimes are among the more frequently encountered error types, making them accessible entry-level pieces for error coin collectors. Value is driven by clip size (larger = more dramatic = more valuable), the clarity of the Blakesley effect, overall coin condition, and whether the date and mint mark remain fully visible. Multiple clips on a single coin — a "bitten" planchet — are rarer and command a notable additional premium over single-clip examples.
