1918 Dime Value Guide: Mercury Dime Worth $3.50-$70,000

1918 Mercury Dime: Strike-Rarity Defines Value

The 1918 Winged Liberty Head (Mercury) Dime designed by Adolph A. Weinman

The 1918 Mercury Dime represents a textbook example of "strike-rarity" rather than mintage scarcity. While Philadelphia, Denver, and San Francisco mints produced nearly 69 million dimes that year, circulated examples are common and trade near their silver melt value of approximately $3.43. However, the quality of strike—specifically the Full Bands (FB) designation—transforms these common coins into significant rarities.

Wartime production pressures during World War I led to relaxed quality control, particularly at the Denver Mint. An estimated 70-80% of Mint State 1918-D survivors lack fully struck bands on the fasces, creating an exponential value gap. A standard MS-65 1918-D sells for $925, while an MS-65 FB commands $15,500—a 16.8x premium. This guide examines values for all three mints, grading diagnostics for the critical Full Bands designation, authentication methods, and the die variety and error landscape for this wartime issue.

How to Identify a 1918 Mercury Dime

Mint mark location: left of the fasces, at the base of the olive branch

Design and Designer

All 1918 dimes feature Adolph A. Weinman's Winged Liberty Head design, commonly called the "Mercury" dime due to Liberty's resemblance to the Roman god. The obverse displays Liberty in profile wearing a winged cap, symbolizing freedom of thought. The reverse shows a fasces (bundle of rods) representing unity, bound by horizontal bands, alongside an olive branch symbolizing peace.

The 1918 issue uses the Obverse Die Variety 3 (ODV-003) hub, a modified design introduced after 1917. According to NGC, the diagnostic features of this hub include a "raised lip around the V on Liberty's cap where it points toward her neck" and "each feather in her wing now has a fine, raised line around its outer edge."

Mint Mark Identification

The mint mark appears on the reverse, at the base of the olive branch, to the left of the fasces:

• Philadelphia: No mint mark (26,680,000 minted)
• Denver: "D" mint mark (22,674,800 minted)
• San Francisco: "S" mint mark (19,300,000 minted)

Business Strike vs. Proof

The U.S. Mint suspended proof coinage for collectors after 1916, focusing on high-volume business strike production to meet wartime commerce demands and silver dollar recoinage requirements under the Pittman Act of 1918. Proof production did not resume until 1936. Therefore, all 1918 Mercury Dimes are business strikes. No proof or specimen examples are known to exist.

1918 Mercury Dime Value Guide by Mint and Grade

The following values reflect retail prices from PCGS and NGC price guides, supplemented with auction results from 2012-2025. Values are separated by standard strike and Full Bands (FB) designation. The melt value floor of $3.43 (based on November 2025 silver spot prices) supersedes published guide values for low-grade coins.

Full Bands (FB) diagnostic: complete separation line between horizontal bands (left) versus weak strike (right)

1918 Philadelphia (No Mint Mark)

The Philadelphia issue is the most common of the three 1918 mintages. Mint State examples are plentiful through MS-64. Gems (MS-65 and higher) with Full Bands designation are moderately scarce but more available than Denver or San Francisco counterparts.

Auction highlights: MS-65: $408 (Jun 2023), $441 (Aug 2012); MS-66: $1,293 (Legend Rare Coin Auctions, May 2023); MS-65 FB: $423 (Heritage Auctions, Jul 2016); MS-66 FB: $1,650 (Heritage Auctions, Dec 2024)

1918-D Denver

The 1918-D is the definitive "strike-rarity" key of the Mercury Dime series. PCGS expert David Hall notes the coin is "not rare in circulated grades" but is "scarce in mint state condition." The true rarity is the Full Bands designation, with an estimated 70-80% of Mint State survivors lacking fully struck bands due to wartime production pressures and die spacing issues.

Auction highlights: MS-65: $840 (PCGS, Feb 2021); MS-67: $4,800 (Stack's Bowers, Sep 2025); MS-66 FB: $70,000 (Rare Coin Wholesalers retail price, Nov 2025)

1918-S San Francisco

The 1918-S has the lowest mintage of the year at 19,300,000. It follows a similar pattern to the 1918-D—common in circulated grades but rare in high-grade Mint State with Full Bands. PCGS estimates approximately 35% of Mint State survivors exhibit full bands, compared to only 20-30% for the 1918-D, indicating better strike quality at San Francisco.

Auction highlights: MS-66: $7,200 (Heritage, Jan 2019); MS-66 FB: $2,702.50 (Stack's Bowers, Mar 2015); MS-67 FB: $105,000 (NGC Price Guide value)

Grading Your 1918 Mercury Dime: Wear vs. Strike

Grading the 1918 Mercury Dime requires distinguishing between circulation wear and weak strike characteristics. This distinction is critical because a coin can be fully Uncirculated (MS-63 or higher) with complete mint luster but still fail to qualify for the Full Bands designation due to a weak strike during production.

Grade progression: G-4 (heavy wear) versus VF-20 (moderate wear) versus MS-65 (uncirculated)

Circulated Grades (G-4 through AU-58)

Good (G-4): Heavy wear across all design elements. Date is legible but may be faint. Liberty's portrait is an outline with no internal detail. Wing feathers are completely worn smooth. On the reverse, the fasces has lost all band definition, appearing as a solid mass. At this grade, the coin's value is typically at or near melt value ($3.43-$5.00 depending on mint).

Very Fine (VF-20): Moderate wear with major design elements visible. Liberty's cheek shows slight flatness but hair curls above forehead remain distinct. Wing feathers show separation but lack fine detail. On the reverse, the horizontal bands on the fasces are worn but still visible as separate entities. The vertical lines of the rods show moderate detail.

Extremely Fine (EF-40): Light wear on highest points only. Liberty's hair detail is sharp except for slight flatness on the highest curls. Wing feathers show clear separation with some interior detail visible. On the reverse, the fasces bands are well-defined but show light wear at the center where the bands cross.

About Uncirculated (AU-50/58): Only traces of wear on the absolute highest points. At least 50% (AU-50) to 90% (AU-58) of original mint luster remains. On the obverse, check Liberty's cheek and the highest point of the wing. On the reverse, the center of the fasces bands may show the slightest friction. The coin should have eye appeal with minimal hairlines or contact marks.

Primary wear points: Liberty's cheek, hair curls, wing midpoint, and fasces bands

Uncirculated Grades (MS-60 through MS-67)

MS-60 to MS-62: No wear, but numerous contact marks and possibly lackluster surfaces. The coin may have a dull or "baggy" appearance from handling in mint bags. Strike quality varies—bands may be weak or strong. These grades represent entry-level Mint State examples.

MS-63 to MS-64: Moderate contact marks with good luster and eye appeal. The strike may range from weak to sharp. An MS-63 with weak bands is common; an MS-63 with Full Bands commands a significant premium. Surface quality and visual appeal improve notably at MS-64.

MS-65 (Gem): Only minor contact marks, with none in focal areas. Strong, uninterrupted mint luster. Excellent eye appeal with good strike for the grade. This is where the Full Bands designation creates exponential value differences—an MS-65 standard strike 1918-D is worth $925, while an MS-65 FB is worth $15,500.

MS-66/67 (Superb Gem): Virtually flawless surfaces with exceptional luster and eye appeal. Contact marks are barely visible even under magnification. At these grades, Full Bands examples are condition census coins commanding five to six-figure prices for the 1918-D and 1918-S.

Strike quality: weak strike with flat details but full luster (left) versus strong strike (right)

Full Bands Diagnostic Criteria

The Full Bands (FB) designation is awarded based on the quality of the reverse strike, specifically the two horizontal bands that bind the fasces:

• Complete Separation: The recessed line separating the two bands must be complete from one edge to the other with no interruptions.
• Distinct Definition: The separation line must be distinct and clearly visible, not mushy or flat.
• No Breaks from Damage: The bands are disqualified if interrupted by circulation wear, gouges, nicks, or surface marks—even if the coin is otherwise Mint State.

The challenge in attribution lies in identifying coins that are fully Uncirculated with complete luster but have flat, weak bands due to poor die spacing or strike pressure. These coins will grade MS-63, MS-64, or even MS-65, but they will not receive the FB designation, drastically affecting their value.

Authentication and Problem Detection

While not a primary counterfeiting target compared to high-value key dates, fake 1918 Mercury Dimes do exist in the marketplace. Additionally, cleaned or damaged coins are common, dramatically affecting value. Authentication requires attention to metrological specifications, surface characteristics, and signs of artificial manipulation.

Authentication: genuine coin (correct diameter 17.90mm, weight 2.50g) versus counterfeit (undersized, overweight)

Counterfeit Diagnostics: A documented counterfeit 1918 dime exhibits specific metrological anomalies that serve as authentication markers. The genuine U.S. Mint specification is 17.90mm diameter and 2.50 grams weight. The documented fake measures 17.68mm (undersized), weighs 2.52 grams (overweight), and has a thickness of 1.41mm (too thick, compared to the genuine range of 1.06-1.35mm). This combination—simultaneously overweight, undersized, and too thick—indicates the piece was struck in a less-dense metal with altered dimensions to approximate the correct weight. Genuine 1918 dimes are 90% silver; the counterfeit's composition is "other" (non-silver).

Cleaned Coin Detection: Cleaning is the most common problem affecting Mercury Dime values. Abrasive cleaning produces fine, parallel "hairline scratches" in the coin's fields, typically visible under magnification or when the coin is rotated under a light. The surface appears bright but lacks the original cartwheeling mint luster characteristic of Uncirculated coins. Chemical cleaning ("dipping") creates a lifeless or "dead" surface appearance. The coin may look unnaturally bright and uniform, inconsistent with its level of wear or the natural toning expected for an 80+ year old silver coin. Cleaned coins receive "Details" grades (e.g., "AU Details, Cleaned") and typically trade near melt value.

Surface Damage: Common damage includes scratches, gouges, heavy rim dings, and environmental pitting. Even minor damage in key areas—such as a scratch across Liberty's cheek or through the fasces bands—can disqualify a coin from a numeric grade. Damaged coins are also assigned "Details" grades with the problem noted (e.g., "MS-63 Details, Scratched").

When to Buy Certified: For any 1918 Mercury Dime valued above $100, professional certification by PCGS or NGC is recommended. For the critical Full Bands designation, third-party grading is essential—the distinction between a standard strike and FB example can represent a 10-fold or greater price difference. At high grades (MS-65 and above), certification provides authentication, grade accuracy, and market liquidity.

Preservation and Storage Best Practices

As a 90% silver coin, the 1918 Mercury Dime is chemically reactive and susceptible to toning, spotting, and corrosion when improperly stored. Following best practices protects both the coin's physical condition and its numismatic value.

Proper Handling: Always hold the coin by its reeded edge. Never touch the obverse or reverse surfaces, as oils from human skin cause permanent damage and can trigger spotting or corrosion over time. When examining the coin, hold it over a soft cloth or padded surface to prevent damage if dropped.

Storage Materials: High-value coins should be stored in archival-quality, inert holders. For certified coins, keep them in their original PCGS or NGC slabs, which provide a hermetically sealed, inert environment. For raw coins, use 2×2 cardboard flips with Mylar windows or inert plastic holders specifically designed for coin storage. Avoid soft "PVC" flips, which leach plasticizers over time and cause green, corrosive residue known as "PVC damage."

Environmental Conditions: Store coins in a cool, dry location with stable temperature and humidity. Avoid basements (high humidity) and attics (temperature fluctuations). A bank safe deposit box provides ideal conditions—controlled environment, security, and protection from household hazards. Silica gel packets can be added to storage containers to control humidity, but avoid direct contact with coins.

Never Clean: Under no circumstances should you clean, polish, or attempt to "improve" a coin's appearance. Even gentle wiping removes microscopic amounts of metal and destroys original surfaces. Professional conservation may be appropriate for valuable coins with active corrosion, but this should only be performed by experts at major grading services. A naturally toned, original surface coin is always worth more than one that has been cleaned.

Die Varieties and Attribution

While the 1918 Mercury Dime is not known for major, high-value die varieties like other dates in the series (such as the 1942/1 overdate), several minor varieties are documented by specialist organizations. These varieties carry minimal premiums in the current market but are of interest to variety collectors and completists.

Repunched Mint Marks (RPMs)

Repunched mint marks occur when the mint mark punch is applied to the die multiple times in slightly different positions, creating a doubled or tripled appearance. Variety Vista, the online reference maintained by CONECA (Combined Organizations of Numismatic Error Collectors of America), includes listings for 1918-D and 1918-S repunched mint marks in their variety index. These varieties are cataloged by specialists and represent legitimate production variations.

However, unlike major RPMs from other years (such as the 1940-S/S RPM FS-501 or the 1916-D/D), the 1918 RPMs are not considered "major" varieties. Neither PCGS nor NGC tracks these varieties in their population reports or price guides. As a result, no reliable public pricing data exists for 1918 RPMs, and they carry little to no premium over standard examples of the same grade.

Doubled Die Varieties

Doubled die varieties result from die manufacturing errors where the hub impresses the design onto the working die multiple times in slightly different positions. This creates doubled images of design elements. The Mercury Dime series includes several well-known doubled dies, most notably the 1919 Doubled Die Obverse.

For the 1918 date, no major Doubled Die Obverse (DDO) or Doubled Die Reverse (DDR) varieties are recognized or tracked by major grading services. While minor hub doubling may exist on some 1918 dies, these are not significant enough to command premiums or warrant certification. No reliable public pricing data exists for 1918 doubled die varieties.

Mint Errors and Production Anomalies

Off-center strike error: 5-10% off-center with visible date commands premium

Mint errors represent dramatic departures from normal production and range from common varieties worth modest premiums to major rarities commanding thousands of dollars. The 1918 Mercury Dime series includes documented examples of several error types, though major errors remain scarce relative to the high mintages produced.

Major Documented Error: Mirror Brockage

A significant 1918 error coin documented by Heritage Auctions is a mirror brockage reverse. This major error features a normal obverse design but an incuse, mirrored image of the obverse impressed into the reverse. Brockages occur when a freshly struck coin fails to eject from the coining chamber and becomes a "die cap," impressing its design into the next blank planchet's reverse. The mint of origin (P, D, or S) for this specific error is unknown because the reverse side—which would carry the mint mark—was obliterated by the brockage. The coin was graded MS-62 by NGC. While a specific auction price was not cited in available references, major brockage errors on classic U.S. silver coins in Mint State typically trade for thousands of dollars.

Wrong Planchet Errors

Wrong planchet errors occur when a dime design is struck on a planchet intended for another denomination. The most valuable wrong planchet errors for dimes involve striking on cent planchets. Diagnostics include copper color and incorrect weight of approximately 3.11 grams (versus the correct 2.50 grams for a dime). These dramatic errors typically sell in the $2,000-$10,000 range for uncertified or average-certified examples. Premium, high-grade, or particularly dramatic examples can be worth multiples more.

Off-Center Strikes

Off-center strikes result from improper planchet alignment in the collar during striking. The most valuable off-center strikes are approximately 5%-10% off-center—dramatic enough to be obvious but allowing the date and mint mark to remain fully visible. Typical retail values range from $75 to $400 depending on the degree of off-center striking, grade, and eye appeal. Coins more than 50% off-center or missing the date command lower premiums due to attribution difficulty.

Other Error Types

Broadstrikes occur when a planchet is struck outside the collar, resulting in a coin with a "spread" or widened appearance and lacking a raised rim. These typically sell for $40-$150. Clipped planchets (straight or curved clips) result from the planchet being punched from a sheet that overlapped a previous punch, creating a missing segment. Values range from $60 to $250. Cuds and die breaks appear as raised blobs of metal caused by broken dies; premiums are highest ($50-$300) when the cud interferes with the date or Liberty's portrait.

Recent Auction Results and Market Data

The following auction results from 2012-2025 provide insight into market performance for 1918 Mercury Dimes at various grades and designations. These prices represent actual hammer prices or retail values from certified dealers and major auction houses.

1918 Philadelphia Standard Strike: MS-65 examples have realized $441 (Aug 2012) and $408 (Jun 2023). An MS-66 brought $1,293 at Legend Rare Coin Auctions in May 2023. For Full Bands examples, an MS-65 FB sold for $423 at Heritage Auctions in July 2016, while an MS-66 FB commanded $1,650 at Heritage in December 2024.

1918-D Denver Standard Strike: An MS-65 certified by PCGS sold for $840 in February 2021. A high-end MS-67 realized $4,800 at Stack's Bowers in September 2025. For the critical Full Bands designation, an MS-66 FB carries a retail price of $70,000 according to Rare Coin Wholesalers (November 2025). This dramatic price reflects the extreme condition rarity of Full Bands examples at gem grades.

1918-S San Francisco Standard Strike: An MS-66 achieved $7,200 at Heritage Auctions in January 2019. A Full Bands example at MS-66 FB brought $2,702.50 at Stack's Bowers in March 2015. The NGC Price Guide lists MS-67 FB examples at $105,000, though actual transactions at this elite level are rare and typically occur through private treaty sales.

These results demonstrate the exponential premium commanded by the Full Bands designation, particularly for the Denver and San Francisco issues. The market for condition census coins (MS-66 FB and higher) is thin, with prices established through dealer retail pricing rather than frequent auction appearances.

Frequently Asked Questions

Research Methodology and Sources

This value guide synthesizes data from PCGS CoinFacts and NGC Price Guide retail values, supplemented with auction records from Heritage Auctions, Stack's Bowers, and Legend Rare Coin Auctions spanning 2012-2025. Silver melt values are calculated using November 2025 spot prices. Die variety information is cross-referenced with CONECA's Variety Vista database. Authentication diagnostics derive from documented counterfeit analysis and industry-standard specifications.

External references include PCGS CoinFacts for the 1918-D and 1918-S issues, which provide mintage data, strike quality analysis, and market commentary from expert David Hall.