The 1966 Dime Value Guide: From 10¢ to $12,500

This is the crown jewel of 1966 Roosevelt dime collecting. The variety occurs exclusively on SMS (Special Mint Set) strikes produced at the San Francisco Mint with polished dies. During die cleaning or preparation, a fiber or lint adhered to the working die surface in the area corresponding to Roosevelt's cheek. When coins were struck, the fiber transferred its shape — which happened to resemble the numeral "5" — as a raised die-incuse impression onto every coin struck from that die.

The diagnostic feature is a faint but distinct raised impression on Roosevelt's cheek, immediately behind and below the corner of his mouth. Under 10× magnification it shows a recognizable "5" shape: a curved lower loop, a vertical stroke, and a crossbar at the top. The impression is raised (standing proud of the surrounding field), not scratched or cut. Critically, it must show uniform depth consistent with a die anomaly, not the inconsistent depth of post-mint tooling.

The variety is officially designated FS-401 in the Fivaz-Stanton Cherrypickers' Guide and carries PCGS number 929327. Collector demand is driven by the dramatic visual story (a mysterious number appearing on a President's face) combined with genuine rarity — only SMS coins from a specific die pair show this feature. The all-time auction record stands at $12,499.99 for a PCGS SP67, sold via eBay in February 2021 per PCGS CoinFacts. A more recent 2023 eBay sale of an SP67 example realized $1,500. Typical certified SP66–SP67 examples sell in the $250–$700 range based on GreatCollections and PCGS auction data.

The SMS Deep Cameo is the finest surface-quality designation achievable on a 1966 Roosevelt dime. These coins were struck at the San Francisco Mint from polished dies with specially prepared planchets, producing two distinct zones on the coin's surface: deeply frosted, snow-white raised devices (portrait, torch, lettering) set against brilliantly reflective, mirror-like fields. PCGS designates this finish "DCAM" (Deep Cameo); NGC uses "Ultra Cameo." Both refer to identical coins with the same premium level.

Visual identification requires examining the coin at multiple angles under a single light source. Tilt the coin to see the field reflect like a mirror — then note the contrast against the frosted portrait. A true DCAM shows "blatant" contrast, not just modest frosting. Coins with slight contrast receive the CAM (Cameo) designation and are worth less. DCAM examples are scarce because the frosting on polished dies fades with successive strikes, meaning only the earliest coins from each die pair receive the deepest cameo effect.

Collector demand is driven by rarity at high grades combined with the visual drama of the cameo contrast. A documented Heritage Auctions sale of an NGC MS-68 Ultra Cameo example realized $1,900. PCGS lists the SP67+ DCAM at $2,600–$3,650. Lower-grade DCAM examples (SP63–65) trade in the $40–$300 range, making them accessible entry points for collectors pursuing the cameo designation. As of NGC's published population data, fewer than two examples have been certified in MS-69 Ultra Cameo with none grading higher.

Full Bands is a strike-quality designation — not a die variety or error — that applies to Roosevelt dimes grading MS60 or better. PCGS awards the FB designation (NGC calls it Full Torch, or FT) when both the upper and lower horizontal bands crossing the torch on the reverse show complete, clean separation with no merging and no significant contact marks across them. The designation indicates an exceptionally sharp strike, which was extremely rare among the 1.38 billion high-speed business strikes of 1966.

To verify Full Bands status, flip the coin and examine the torch under a 10× loupe. The torch has two pairs of horizontal bands — one near the top and one near the bottom of the torch shaft. Both bands must show clear visual separation (a gap of field between the inner and outer edges of each band). If the bands appear merged, flat, or indistinct, the coin does not qualify. At 1966's high mint production speeds, most dies were overworked before the coin run ended, leaving the majority of examples with weakly struck bands.

The premium for Full Bands on 1966 business strikes is dramatic and well-documented. At MS67, a base strike is worth roughly $30, while an MS67 FB example commands about $700 — a 23-fold premium per PCGS price guide data. At MS68 FB, Heritage Auctions recorded the record sale of $2,820 in November 2013 for the finest Full Bands example known at that time. PCGS lists the population of MS68 FB at just 3 examples; NGC census shows 4 examples at MS68 FB, making any gem Full Bands coin a genuine condition rarity.

The missing clad layer error occurs during planchet preparation, before the blank ever reaches the coining press. The 1966 Roosevelt dime's copper-nickel clad composition consists of a 75% copper / 25% nickel outer layer bonded to a pure copper core. If the bonding process fails on one side — due to a defective planchet strip — the resulting blank is struck without a clad layer on one face. The struck coin then shows the copper core directly on that surface.

Visual identification is straightforward: the affected side of the coin appears distinctly copper-red or copper-brown in color rather than the silver-gray of the clad surface. The opposite side retains its normal clad appearance. The coin also weighs slightly less than the standard 2.27 grams due to the missing metal layer. A complete one-sided missing clad layer is unmistakable; partial clad separation (lamination) is a related but less dramatic defect worth less.

This error is considered among the more desirable 1966 dime errors because it is visually dramatic, unambiguous, and clearly originates at the mint rather than from post-mint damage. The value depends heavily on whether the missing layer affects the obverse or reverse, how complete the absence is, and the overall surface quality of the coin. Documented valuations place missing clad layer 1966 dimes at approximately $600 for well-preserved examples, though severe or complete examples on high-grade hosts can exceed this. Authentication by PCGS or NGC confirms mint origin and rules out acid-stripping damage.

An off-center strike occurs when the planchet is improperly seated under the dies at the moment of striking. Instead of the design being centered on the coin, it appears shifted to one side, leaving a corresponding crescent-shaped area of blank planchet on the opposite side. The percentage of off-center shift — measured by estimating how much of the design is missing — directly determines the coin's value and visual appeal.

Minor off-center strikes of 5–10% are relatively common and add modest premiums of $40–$50. Value increases dramatically with the degree of shift, as long as the date remains fully visible (date-visible pieces command significantly more than dateless examples). A 1966 dime with a double strike where the second strike was approximately 80% off-center, graded PCGS MS-63, realized $360 at documented auction. Broadstrikes — where the collar restraint fails entirely and the design spreads flat — are a related error with similar collector appeal.

Collectors prize dramatic off-center examples both for visual impact and as unambiguous proof of a mint production failure. The coin's standard weight, composition, and die details confirm mint origin; post-mint alteration cannot replicate the precise planchet-edge geometry of a genuine off-center strike. Grade matters significantly — an MS63 off-center is worth far more than a worn example with the same shift percentage. Any dramatic (50%+) off-center 1966 dime should be authenticated and slabbed before sale.

A clipped planchet error occurs before the coin is struck, during the blanking process when circular planchets are punched out of metal strip. If the strip feeds through the punching machine too quickly — before the previous punch hole has fully cleared — the next punch overlaps a hole, producing a blank with a curved section removed from its edge (a curved clip). Straight clips occur when the punch hits the strip near a leading or trailing edge. The Blakesley effect — a weakened area directly opposite the clip on the struck coin — is a key authenticity indicator.

On a finished 1966 dime, the clipped planchet appears as a missing section of the coin's edge and rim — curved for a curved clip, straight for a straight clip. Elliptical clips (two curved clips meeting) are the most dramatic and most valuable type. The Blakesley effect manifests as a flat, weakly struck area of the rim and design directly opposite the clip location; coins without this effect should be viewed skeptically. The clip's size — measured as a percentage of the coin's diameter — drives value directly.

Clipped planchet errors are the most commonly found mint error type on 1966 Roosevelt dimes, making them accessible entry-level error coins. Minor clips (5–10% of diameter) add $10–$30 in premium. Larger curved clips typically trade in the $30–$85 range. Elliptical (two-clip) examples can bring $100 or more depending on size and grade. At auction, a 1966 dime with a clip graded AU-64 by ANACS sold at Stack's, demonstrating that graded clipped planchet errors exist and trade at defined premiums. Authentication confirms the Blakesley effect and rules out post-mint edge damage.