The unique 1966 quarter graded PCGS MS68+ sold for $21,000 at Heritage Auctions on May 7, 2023 — making it the most valuable clad Washington quarter from this era. Most circulated examples are worth only face value (25 cents), but gems, SMS coins, and error varieties create dramatic collector premiums. No 1966 quarters contain silver, and none carry a mint mark — both are features of this historic transition-era coin.
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Select your coin's type, condition, and any known errors. All 1966 quarters lack a mint mark — that is normal. The calculator uses verified PCGS auction data to return an estimated value range.
Type a description below. Mention the surface finish, any doubling you see under magnification, or unusual features like color or weight discrepancies.
The free calculator above covers every 1966 quarter type — circulated face value, gem business strikes, SMS Standard/Cameo/Deep Cameo, and all major error varieties.
Go to the CalculatorThe 1966 SMS Special Mint Set quarter is the most collectible regular issue for this date, with Deep Cameo examples reaching $6,500 at SP67 and CAM examples reaching $4,113 at auction. But SMS coins are frequently confused with polished regular business strikes. Use this checklist to distinguish them accurately before grading submission.
Frosty cartwheel luster that rotates when tilted under a single light. Normal rim profile. Struck at high speed on standard planchets. MS-63 to MS-65: $1–$16. MS-67 scarce (fewer than 100 PCGS-certified): $285–$1,350. The unique MS68+: $21,000.
Distinctive satin or semi-reflective finish, smoother than business strike luster. Noticeably sharper strike detail on Washington's hair and eagle features. Finest examples show frosted portrait against reflective fields (Cameo/DCAM). SP67 DCAM: ~$2,650; SP68 CAM: $4,113 auction record.
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For a complete illustrated 1966 quarter identification guide covering every variety, condition tier, and error attribution, consult the detailed 1966 quarter identification and value breakdown by condition. The table below covers all major varieties using verified PCGS and NGC auction data.
| Variety | Worn / Circulated | Uncirculated (MS/SP 60–64) | Gem (65–66) | Superb Gem (67+) |
|---|---|---|---|---|
| 1966 Business Strike (No Mint Mark) | $0.25 (face value) | $1 – $10 | $16 – $30 | $285 – $21,000 |
| 1966 SMS Standard (No Designation) | — | $2 – $10 | $10 – $20 | $20 – $55+ |
| 1966 SMS Cameo (CAM) | — | $10 – $30 | $20 – $100 | $100 – $4,113 |
| 1966 SMS Deep Cameo (DCAM) | — | $30 – $75 | $150 – $500 | $2,650 – $6,500 |
| DDR FS-801 (Only 6 Certified Total) | $200 – $920 | $500 – $2,000 | $2,000 – $5,750 | $5,750+ (NGC PG) |
| Wrong Planchet — Cent (reddish, ~3.11g) | $300 – $900 | $900 – $1,500 | $1,500+ | Rare |
| Wrong Planchet — Nickel (~5.00g) | $100 – $288 | $288 – $600 | $600+ | Rare |
| Wrong Planchet — Dime (~2.27g) | $100 – $300 | $300 – $600 | $600+ | Rare |
| Off-Center Strike (25%+, full date) | $50 – $100 | $100 – $200 | $200+ | — |
| Struck-Through Error (major) | $50 – $200 | $200 – $576 | $576+ | — |
All values are estimates based on PCGS auction data · 2026 edition. MS68+ auction record: $21,000 (Heritage Auctions, May 7, 2023). DDR FS-801 values per NGC Price Guide and Heritage Auctions realized prices.
The 1966 Washington quarter was produced during one of the most chaotic transitions in U.S. Mint history — the first full production year of the new copper-nickel clad composition, running at maximum capacity to replace hoarded silver coins. Over 821 million business strikes were produced at Philadelphia alone, alongside 2.26 million SMS coins at San Francisco. The combination of enormous volume, new planchet materials, and retooled production processes created a distinctive set of varieties and errors that continue to attract specialists. Below are the six most significant, ranked by maximum collector value.
The 1966 SMS Deep Cameo quarter represents the pinnacle of 1966 Washington quarter collecting for non-error specialists — a coin that combines the superior striking quality of the Special Mint Set production process with the rarest possible surface designation. The U.S. Mint introduced Special Mint Sets in 1965 as a collector substitute when traditional proof sets were suspended, producing these coins at the San Francisco Mint on specially polished planchets using carefully prepared dies. The result was a coin with sharper definition, better surface quality, and a distinctive satin or semi-reflective finish superior to regular business strikes. However, the finest SMS examples also developed the contrast between frosted design elements and reflective fields that characterizes the Cameo (CAM) and Deep Cameo (DCAM) designations. On a Deep Cameo 1966 SMS quarter, Washington's portrait and the eagle appear bright white or frosted against fields that reflect like a dark mirror — a visual effect of maximum intensity that PCGS and NGC designate as DCAM (Deep Cameo) or UC (Ultra Cameo) respectively. According to PCGS population data, Deep Cameo examples are exceptionally rare across the 1966 SMS series, with only two grade levels (SP67 and SP68) showing any population at all. A 1966 SMS Cameo quarter graded SP68 sold for $4,113 at Heritage Auctions in 2012, and SP67 DCAM examples have traded at approximately $2,650, with SP68 DCAM examples valued at $6,500 or more. For registry set collectors building comprehensive 1965–1967 SMS sets, the Deep Cameo designation is the most sought-after and competitively priced finish across all three transitional years.
The DDR FS-801 is the single officially recognized die variety for the 1966 Washington quarter series, cataloged in the Cherrypickers' Guide to Rare Die Varieties by Fivaz and Stanton. With only 4 certified examples at PCGS and 2 at NGC — a total population of just 6 graded coins across both major services — this is one of the rarest documented die varieties in the modern clad Washington quarter series. The variety shows clearly separated doubling on reverse lettering, with UNITED STATES OF AMERICA and QUARTER DOLLAR being the primary areas of visible doubling. The doubling requires 10x to 20x magnification to see clearly on most examples, with the secondary images appearing as rounded, separated impressions beside the primary letters. The FS-801 designation comes from the Cherrypickers' Guide, the authoritative reference for die variety attribution. As with all doubled dies, the production mechanism involved misalignment between the master hub and the working die during multiple hub impressions — a process that was still standard at the U.S. Mint during 1966 production. The resulting doubled die then transferred its characteristic doubling to every coin struck from it, making this a true variety rather than a unique error. The auction record is $920 for an XF-45 example sold at Heritage Auctions in April 2012, reflecting the rarity of these pieces even in well-circulated condition. The NGC Price Guide theoretically values an MS-68 example at $5,750, though whether such an example actually exists in certified form is unknown given the tiny total population. Any suspected DDR FS-801 example should be submitted to PCGS or NGC for professional attribution before any transaction.
A 1966 Washington quarter struck on a Lincoln cent planchet is one of the most visually shocking wrong-planchet errors in the modern clad series — a coin that is immediately, unmistakably wrong from the moment you pick it up. These errors occurred when a copper cent planchet accidentally entered the quarter production line and received a full quarter die impression. The result is a coin that combines the design of a Washington quarter with the composition, size, and color of a Lincoln cent. The most obvious diagnostic is color: the coin appears distinctly reddish-bronze or copper-colored rather than the silver-gray of a normal clad quarter, because the copper cent planchet contains no nickel-clad layers. This color difference is visible from arm's length and makes the error impossible to overlook on any genuine example. The second key diagnostic is weight: a cent planchet weighs 3.11 grams, compared to the 5.67 grams of a standard 1966 quarter — a discrepancy of more than 2.5 grams that is immediately apparent on any precision scale. The third diagnostic is size: the quarter die is larger than the cent planchet, meaning the outer portion of Washington's design — including much of LIBERTY, the date area, and on the reverse, QUARTER DOLLAR and UNITED STATES OF AMERICA — will be partially or fully cut off due to the planchet's inability to reach the full die impression area. According to CoinKnow research, the average historical sale price for a 1966 quarter struck on a cent planchet is approximately $900, with well-documented examples in higher grades having the potential to reach significantly more at major coin auctions. PCGS or NGC authentication is mandatory for any transaction involving this error type.
A 1966 Washington quarter struck on a Jefferson nickel planchet is among the trickiest wrong-planchet errors to identify on this date, precisely because the nickel planchet shares the same copper-nickel composition as the quarter itself. Unlike the cent planchet error — where the reddish-bronze color immediately reveals the mismatch — a quarter struck on a nickel planchet looks superficially normal at first glance. The coin appears silver-gray, the same general color as a legitimate 1966 quarter. The mismatch is revealed only on closer examination. The first and most reliable diagnostic is weight: a Jefferson nickel planchet weighs 5.00 grams, while a standard 1966 quarter weighs 5.67 grams — a difference of 0.67 grams that is detectable with a precision scale sensitive to at least 0.1 grams. The second diagnostic is size: a nickel planchet measures 21.2 mm in diameter versus the 24.3 mm of a quarter, meaning the outer design will be cut off or weak around the periphery. QUARTER DOLLAR, UNITED STATES OF AMERICA, and the outer rim design elements will show truncation or weakness. The third diagnostic is the edge: a genuine 1966 quarter has a reeded (ridged) edge, while a coin struck on a nickel planchet without a properly sized collar will show a smooth or partially smooth edge due to the planchet not filling the collar. A 1966 quarter struck on a nickel planchet, graded PCGS MS64, sold for $402 in 2017 per HistoryTools research. All suspected wrong-planchet examples require professional PCGS or NGC authentication before any transaction.
Off-center strikes on 1966 Washington quarters are among the most accessible and visually dramatic error types available from this transitional year, combining the historical significance of the first full clad production year with one of the most immediately recognizable minting errors. These errors occur when the coin planchet is not properly centered between the obverse and reverse dies at the moment of striking, resulting in part of Washington's portrait and the surrounding inscriptions being impressed on the planchet while a blank, unstruck crescent of copper-nickel clad metal remains visible on the opposite edge. The enormous production volume of 1966 business strikes — 821 million coins at Philadelphia alone — inevitably produced off-center examples when planchet feeding mechanisms occasionally misfed blanks into the striking collar. For collectors, value scales with two primary factors: the percentage of off-center displacement (larger equals more visual impact and higher collector demand) and whether the full date “1966” remains completely readable on the struck portion of the coin. A minor 5–10% off-center displacement commands only modest premiums of $5 to $20 above face value. More dramatic 20–35% examples with the full date visible bring $50 to $150 in typical condition. Extreme strikes of 40–50% or more with intact dates can reach $200 or more in uncirculated grades. The copper-nickel clad composition of 1966 quarters means these coins have no significant melt value, making the error premium the sole driver of value. Collectors also prize examples where the reverse is dramatically off-center with the eagle clearly visible alongside a substantial blank planchet crescent.
Struck-through errors on 1966 Washington quarters occur when a foreign object — a fragment of wire, cloth fiber, grease, die cap material, or other debris — becomes caught between the coin die and the planchet at the moment of striking. The foreign material prevents part of the die's design from fully transferring to the planchet, leaving behind a distinctive impression, cavity, or textured area that clearly stands out from the surrounding struck design. The result depends on the nature of the interposed material: a hard object like a wire fragment creates a sharply defined raised area on the coin where the die was blocked; soft material like grease or cloth creates a softer, more diffuse weakness in the design. The 1966 production environment — with new copper-nickel clad planchets being processed at maximum speed through adjusted machinery — created more opportunities for debris contamination than normal production years. Common types documented on 1966 quarters include wire struck-throughs, which leave recognizable wire-shaped impressions; grease fills, which cause letter weaknesses or missing design areas; and die cap struck-throughs, which occur when a previously struck coin sticks to the die and transfers its impression to subsequent coins. Values vary substantially based on the nature, size, and location of the struck-through feature. Minor grease fills and small debris impressions add $14 to $50 above face value. More dramatic examples covering significant design areas can bring $200 to $576, as documented by Heritage Auctions records of major struck-through sales on 1966 quarters. A rare “Struck-In & Retained Wire Obverse, Magnetic” example in AU-58 condition sold for $1,080 in 2023 per USCoinsValue research, demonstrating that exceptional examples of this error type can command significant premiums at specialized numismatic auctions.
Use the free value calculator above to get an estimated price range based on your specific coin type, error, and condition.
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| Issue | Strike Type | Mintage | Mint Mark | Facility |
|---|---|---|---|---|
| 1966 Regular Strike | Business Strike | 821,101,500 | None (policy) | Philadelphia Mint |
| 1966 SMS | Special Mint Set (Specimen) | 2,261,583 | None (policy) | San Francisco Mint |
| Total 1966 Quarter Production | 823,363,083 | — | — | |
Washington's cheek and hair high points flat. Worth face value: 25 cents. Extremely common.
Slight friction on cheekbone and high hair only. Most luster survives. Worth $0.50–$2.
No wear. Original cartwheel luster. Contact marks may be visible. Worth $1–$10.
Fewer than 100 PCGS-certified at MS-67. MS-67: $285–$1,350. Unique MS-68+: $21,000.
Heritage Auctions sold the record-setting MS68+ for $21,000 in May 2023 and the DDR FS-801 XF-45 for $920 in 2012. Best for confirmed MS-67 or better business strikes, SMS DCAM quarters in SP67+, confirmed DDR FS-801 examples, and significant wrong-planchet errors. Consignment fees apply but specialist bidding achieves competitive prices for high-value pieces.
Effective for mid-range 1966 quarters and SMS coins in typical collector grades. Check recently sold prices for 1966 Washington quarters on the market to calibrate your listing price. PCGS or NGC slabs with the specific grade and designation (CAM, DCAM) increase buyer confidence and realized prices in the $50–$500 range.
Best for immediate cash and in-person evaluation. Coin shops typically offer 50–70% of retail for collectible pieces. Coin shows provide multiple dealer access for competitive offers. Also valuable for a free in-person assessment on whether a suspected SMS DCAM or DDR variety is worth the grading submission fee before sending to PCGS or NGC.
Circulated 1966 quarters in worn condition are worth only face value (25 cents). They contain no silver, have no significant scarcity, and carry no error premium. Dealers typically cannot offer more than face value for common circulated examples. The most efficient route is spending them or saving them for bulk face-value rolls. Only condition rarities (MS-67+) and error coins have meaningful collector value.
Most circulated 1966 quarters are worth face value (25 cents). They contain no silver and are not scarce. Uncirculated MS-63 to MS-65 examples: $1–$16. MS-67, which is scarce with fewer than 100 PCGS-certified examples: $285–$1,350. The all-time record is $21,000 for the unique MS68+ sold at Heritage Auctions on May 7, 2023.
The Coinage Act of 1965 directed the U.S. Mint to remove mint marks from all circulating coins from 1965 through 1967. The reasoning was that collectors had been selectively pulling coins with scarce mint marks from circulation, contributing to a nationwide coin shortage. This no-mint-mark policy applied to quarters, dimes, and half dollars. Mint marks returned in 1968. The absence of a mint mark on a 1966 quarter is normal — not an error or special variety.
No. The 1966 quarter contains zero silver. It is 91.67% copper and 8.33% nickel in a clad construction over a pure copper core. The copper stripe on the edge confirms this. A genuine 1966 quarter weighs 5.67 grams; a pre-1965 silver quarter weighs 6.25 grams. The weight difference is the simplest test.
The 1966 SMS quarter was struck at the San Francisco Mint as a collector substitute for traditional proof sets, which were suspended from 1965 to 1967. Approximately 2,261,583 five-coin SMS sets were produced. SMS quarters have a distinctive satin finish and sharper strike than business strikes. Graded using the SP (Specimen) prefix. High-grade SMS quarters with Deep Cameo contrast at SP67–SP68 are the most valuable regular 1966 collector issues.
The DDR FS-801 is the only officially recognized die variety for the 1966 quarter, showing clearly separated doubling on UNITED STATES OF AMERICA and QUARTER DOLLAR on the reverse. With only 4 PCGS-certified and 2 NGC-certified examples, it is extraordinarily rare. The auction record is $920 for an XF-45 sold at Heritage Auctions in April 2012. The NGC Price Guide theoretically values MS-68 at $5,750.
A cent planchet error shows reddish-bronze color and weighs ~3.11g — average sale approximately $900. A nickel planchet error looks similar in color but is smaller and lighter at ~5.00g, with a smooth edge — sold for $288–$402. A dime planchet error weighs ~2.27g and shows dramatic design truncation — worth $100–$300+. PCGS or NGC authentication is required for any wrong planchet transaction.
Three characteristics distinguish a genuine 1966 SMS: (1) distinctive satin or semi-reflective finish smoother than business strike cartwheel luster; (2) noticeably sharper strike on Washington's hair and eagle breast feathers; (3) the finest SMS examples show frosted portrait against reflective fields (Cameo/DCAM contrast). A polished business strike may look similar but will lack consistent satin finish and die sharpness throughout.
MS68+ is the finest certified grade for any 1966 Washington quarter business strike — and only one coin has achieved it. The + modifier indicates the coin exceeds standard MS68 quality without reaching MS69. This unique example sold for $21,000 at Heritage Auctions in May 2023, emerging as a condition rarity from 821 million coins struck that year.
Grading is worthwhile for any 1966 quarter potentially grading MS-67 or better, SMS quarters with strong Cameo or Deep Cameo contrast at SP67+, suspected DDR FS-801 examples, and any suspected wrong-planchet error. For common circulated examples worth only face value, the $17–$30 grading fee far exceeds any potential premium.
The copper stripe on the edge is the exposed pure copper core of the coin's clad construction. A 1966 quarter is built like a sandwich: outer layers of 75% copper / 25% nickel bonded to a pure copper core. Viewed from the edge, the reddish copper core is visible between the two silver-colored nickel layers. This stripe is the quickest way to confirm a 1966 quarter is not silver — pre-1965 silver quarters show a uniform silver-gray edge with no stripe.
The U.S. Mint omitted mint marks from circulating quarters (and dimes and half dollars) for three years: 1965, 1966, and 1967. This was a policy response to the coin shortage caused by silver hoarding. Mint marks returned starting with 1968-dated coins. The SMS coins struck at San Francisco for collectors during 1965–1967 also carry no mint mark due to the same policy.
The free calculator covers every type — face value circulated, gem business strikes up to MS-67+, SMS Standard through Deep Cameo, DDR FS-801, and all wrong planchet error varieties.
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