One 1940 Mercury dime graded MS-68 FB sold for $35,250 at Legend Rare Coin Auctions in 2019 — yet most worn examples trade for just a few dollars over face value. The entire difference hinges on two things: mint mark and whether the fasces bands are fully struck. This free guide shows you exactly where your coin lands.
For a thorough step-by-step 1940 Mercury dime identification walkthrough, including high-resolution photos of every grade tier, bookmark that guide alongside this chart. The table below summarizes typical retail values across all mint marks and condition levels — the Full Bands (FB) column shows the major premium a well-struck reverse commands.
| Variety | Worn (G-VF) | Circulated (EF-AU) | Uncirculated (MS) | Gem / FB (MS-65+) |
|---|---|---|---|---|
| 1940-P (No mark) | $4.50 – $6 | $6.50 – $7 | $12 – $35 | $35 – $800 |
| 1940-P FB ★ SIGNATURE | — | — | $20 – $100 | $90 – $1,650+ |
| 1940-D Denver | $4.50 – $6 | $6.50 – $7 | $15 – $40 | $40 – $700 |
| 1940-D FB | — | — | $25 – $70 | $60 – $1,700+ |
| 1940-S San Francisco | $4.50 – $6 | $6.50 – $7 | $15 – $45 | $45 – $700 |
| 1940-S FB | — | — | $30 – $85 | $75 – $3,000+ |
| 1940-P Proof RAREST | — | — | $150 – $225 | $395 – $17,500+ |
| 1940-S/S RPM FS-501 | $14 – $20 | $25 – $40 | $50 – $150 | $150 – $400 |
| 1940-S DDO/DDR FS-901 | — | $50 – $100 | $150 – $250 | $250 – $300+ |
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Most 1940 Mercury dimes are common silver coins worth just over melt value — but a handful of die varieties and mint errors can multiply that figure dramatically. The cards below cover every significant 1940 error in descending order of collector demand, from the two FS-listed San Francisco varieties to the production errors that escape standard attribution.
The 1940-S/S RPM FS-501 is the most widely collected die variety from the 1940 series. It occurred when the "S" hub punch was pressed into the working die on two separate occasions at slightly different positions, leaving a visible ghost or shadow impression of a second mint mark letter.
Under a 10× loupe, the secondary "S" impression appears either north, south, or slightly rotated relative to the primary mark. The separation between the primary and secondary punch is typically modest — usually less than a full letter-width — but it is consistent and diagnostically definitive when compared to a reference image.
Collector demand is strong because this variety is listed and numbered in the Cherrypickers' Guide, making it easy to attribute and market. The premium runs from a modest few dollars over spot in Good grades to several hundred dollars in top mint state, with certified examples commanding the best results.
The 1940-S DDO/DDR FS-901 is the scarcest recognized die variety from this date and the only one showing hub doubling on both faces of the coin simultaneously. It arose during the hubbing process when the working die was imperfectly indexed on the second squeeze, creating a rotated or shifted secondary image of the design elements.
The doubling is visible on the obverse in the lettering of LIBERTY and on the date digits, and on the reverse in the legends and fasces design. Because the doubling affects both sides, every die-struck coin from that specific working die carries the same diagnostics — making positive attribution straightforward with the right reference materials.
This variety commands a notable premium over ordinary 1940-S dimes due to its dual-sided doubling and FS listing. Examples are scarcer in certified populations than the RPM FS-501, which makes top-grade certified specimens particularly desirable among Mercury dime specialists.
Off-center strikes occur when a planchet (blank coin disk) feeds into the coining press misaligned between the obverse and reverse dies. Only part of the design transfers to the coin's surface, leaving a blank crescent-shaped area where the planchet extended beyond the dies' reach.
The degree of offset — typically measured as a percentage — drives value directly. A coin that is 10–20% off-center with the full date and mint mark still visible in the struck portion is worth $75–$150. More dramatic examples at 40–60% off-center can bring $300–$500, provided the date and mint mark remain legible for positive attribution to the 1940 issue.
Off-center 1940 dimes from all three mints are known. The reeded edge may show a partial or interrupted reed pattern where the collar failed to engage. These coins attract broad collector appeal because the visual drama of misalignment is immediately apparent even without magnification, making them excellent display pieces.
Die crack errors appear as raised lines on the struck coin surface — the reverse of what you see on the die itself. When a hardened steel die develops a stress fracture from the enormous pressure of repeated striking cycles, coin metal flows into that crack and produces a raised ridge on every subsequent coin struck by that die.
The most sought-after 1940 die crack is the "Cracked Skull" variety, produced when a crack developed across the die in the area of Liberty's head on the obverse. The resulting raised ridge runs through or near Liberty's cap and skull area, creating a visually striking and memorable appearance. Philadelphia, Denver, and San Francisco dies all developed various crack patterns, but the Cracked Skull is the most recognized.
Value depends on the size, placement, and prominence of the crack. Minor rim cud breaks or small radiating cracks add a modest $10–$30 premium over base value. A dramatic Cracked Skull traversing the portrait with a heavy, raised ridge can reach $75–$150+ in uncirculated condition. The 1940-S reverse rim cud variety is a related collectible, with examples selling around $34 on the secondary market.
A clipped planchet error results from an improperly blanked coin disk. When the punch used to cut circular blanks from the silver strip overlaps a hole left by a previously punched blank — or hits the strip at the edge — the resulting planchet is missing a curved or straight-edged section. Every coin struck from that miscut blank will carry the clip as a permanent feature.
On 1940 Mercury dimes, curved clips (following the arc of the coin) are the most common type. Straight clips, which occur at the strip's edge, are less frequently encountered. Coin size and weight are both reduced, and the Blakesley Effect — a corresponding area of weakness in the design directly opposite the clip — is often visible and helps confirm authenticity of the error.
Collector interest in clipped planchet errors is steady. These pieces are visually distinctive even at a glance and represent a true mint production anomaly. Raw (ungraded) 1940 dime clipped planchets trade around $17–$30 on secondary market platforms; larger or more dramatic clips on well-struck coins with full design details can bring $50–$75 in attractive condition.
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| Mint | Mint Mark | Business Strike Mintage | Proof Mintage | Notes |
|---|---|---|---|---|
| Philadelphia | None | 65,350,000 | 11,827 | Highest mintage; FB coins paradoxically scarce |
| Denver | D | 21,198,000 | — | Generally better strike quality than Philadelphia |
| San Francisco | S | 21,560,000 | — | Home of both FS-listed varieties (RPM & DDO/DDR) |
| Total | 108,108,000 | 11,827 | All three mints combined | |
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The Full Bands (FB) designation is the single most important factor separating a $35 coin from a $1,000+ coin on the same 1940 date. Use this checklist to assess whether your coin may qualify — then get it certified to unlock the full premium.
Answer all four questions about your coin's reverse fasces:
The Full Bands checker tells you what you have — the calculator below tells you what it's worth based on your specific mint mark, grade, and any error varieties.
Calculate My Coin's Value →Select your coin's mint mark, condition, and any known varieties to get an instant estimated value range.
If you're not yet sure of your coin's mint mark, condition, or errors, there's a 1940 Mercury Dime Coin Value Checker online tool that estimates value from photos and is designed to be beginner-friendly.
Not sure how to use the calculator? Describe what you see on your coin in plain language and get a customized analysis.
The right venue depends on what you have. A circulated example is best liquidated quickly as silver; a certified FB coin belongs in a specialized auction.
Circulated 1940 Mercury dimes from all three mints are worth roughly $4.50–$7.00, just above silver melt value. Uncirculated examples without the Full Bands designation range from around $12 to $800 depending on grade. Coins earning the Full Bands (FB) designation command significant premiums — the top auction record is $35,250 for a 1940 Philadelphia MS-68 FB, sold in 2019 at Legend Rare Coin Auctions.
Full Bands (FB) refers to the two central horizontal bands on the fasces design on the coin's reverse being fully split and raised — meaning a complete, unbroken dividing line separates both bands across their entire width. Third-party graders (PCGS, NGC) add the "FB" suffix to the grade when this standard is met. Full Bands examples are scarce for all 1940 mint issues, especially on high-mintage Philadelphia coins where dies wore quickly.
Three mint facilities struck 1940 Mercury dimes: Philadelphia (no mint mark) with 65,350,000 business strikes plus 11,827 proof coins; Denver (D mint mark) with 21,198,000 strikes; and San Francisco (S mint mark) with 21,560,000 strikes. The mint mark appears on the reverse at the base of the torch/fasces, to the right of the word "ONE." All three are common in circulated grades; high-grade FB examples are the true rarities.
In circulated condition, all three mints are worth roughly the same — about $4.50 to $7.00. In high uncirculated grades, the 1940-S can be more valuable than the 1940-P in non-FB examples. However, the 1940-P paradoxically commands the highest FB premiums (top record: $35,250) because the Philadelphia Mint's high-volume production wore dies quickly, making fully struck FB coins genuinely rare despite the large total mintage.
Known 1940 Mercury dime errors and varieties include: the 1940-S/S Repunched Mint Mark (RPM FS-501) worth $14–$400 by grade; the 1940-S DDO/DDR (FS-901), showing doubling on both sides, worth around $50–$300; off-center strikes ($75–$500 depending on degree); broadstrikes ($100–$250); clipped planchets (around $17–$75); die crack errors including the "Cracked Skull" variety on the obverse; and lamination errors worth $20–$150.
The mint mark on a 1940 Mercury dime is found on the reverse side, at the base of the fasces (the bundle of rods), to the right of the word "ONE." Look for a "D" (Denver) or "S" (San Francisco). Philadelphia coins have no mint mark. The area can be small and partially obscured on worn coins — use a 10× loupe for a clear view, especially when checking for the S/S repunched mint mark variety.
The 1940 Mercury dime is composed of 90% silver and 10% copper, with a total weight of 2.50 grams and diameter of 17.9 millimeters. It has a reeded edge. The silver content is approximately 0.0723 troy ounces, giving each coin an intrinsic melt value that fluctuates with the silver spot price — typically around $5.50–$6.50 at common silver price ranges, which acts as a floor value for even the most heavily worn specimens.
Proof 1940 Mercury dimes were struck only at Philadelphia (no mint mark) with a mintage of 11,827. They display mirror-like (reflective) fields contrasting with the coin's design elements. The devices may show frosting on higher-quality examples (Cameo proofs). Proof coins also typically show extremely sharp, squared-off design details compared to business strikes. In grades PF-63 to PF-65, proofs are worth roughly $150–$225; Cameo proofs at PF-67 or above can reach $3,500–$5,000+.
The 1940-S/S Repunched Mint Mark (RPM FS-501) is a die variety where the "S" mint mark was punched into the die more than once, creating a doubled or shadowed appearance of the mint mark itself. It is listed as FS-501 in the Cherrypickers' Guide. In circulated grades (G-4), specimens trade around $14–$20; in AU-58, around $33. Higher-grade mint state examples can reach up to $400 depending on strike and surface quality.
No — never clean a 1940 Mercury dime or any collector coin. Cleaning removes original mint luster, creates hairlines, and dramatically reduces numismatic value. A cleaned coin that might have been worth $50–$100 in original condition could sell for just over its silver melt value. If you believe your coin is uncirculated or has a valuable variety, submit it to PCGS or NGC for professional third-party grading. Dealers and auction houses can immediately identify cleaned coins and discount them heavily.
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