1945 Mercury Dime Errors: Value Guide & Rare Varieties
Complete 1945 Mercury Dime error value guide. Identify the Micro S FS-512 (up to $25,850), D/Horizontal D RPM FS-502, S/Horizontal S RPM FS-503, and DDO FS-101. Full diagnostics, prices, and auction records for all 8 major varieties.
Most 1945 Mercury Dimes are worth $3–$6 in circulated grades (silver melt value), but three identifiable errors push values from $25 to $25,850—and Full Bands specimens can reach $96,000.
- 🔍 S mint — Micro S (FS-512): A tiny, sharp-serif mintmark worth $15–$25 circulated; up to $25,850 gem with Full Bands.
- 🔍 D mint — D/Horizontal D RPM (FS-502): A sideways D hiding inside the upright D; worth $35–$600+ depending on grade.
- 🔍 Philadelphia (no mintmark) — DDO FS-101: Doubled date numerals and split motto letters; worth $330–$1,706+ in Mint State.
- 💎 Full Bands on any coin: Fewer than 2% of 1945-P coins qualify. The record for an MS68 FB is $96,000.
⚠️ Beware flat, smeared-looking doubling — that is machine doubling, not a valuable doubled die, and adds zero premium. All 1945 Mercury Dimes contain silver, so even worn coins have a melt-value floor.
1945 Mercury Dime Errors Error Checker
Check your coin for valuable errors and varieties
Values shown are typical retail estimates as of 2025-01.
All 1945 Mercury Dimes contain 0.07234 troy oz of silver; melt value fluctuates with silver spot price.
Error coin values vary significantly based on grade, Full Bands designation, eye appeal, and market conditions.
Professional authentication (PCGS/NGC) is recommended for high-value varieties including Micro S, RPMs, and DDOs.
Machine Doubling (flat, shelf-like) is NOT a valuable doubled die variety and carries no premium.
1945 is the final year of the Mercury Dime series; it was replaced by the Roosevelt Dime in 1946.
1945-P coins are notorious for weak strikes; less than 2% qualify for the Full Bands designation.
The 1945 Mercury Dime closed Adolph Weinman's celebrated Winged Liberty Head series on a note of wartime urgency — and that urgency created errors. Mints pushed output to record levels, kept dies in service long past their prime, and hand-punched mintmarks under production pressure. The result: a coin that looks ordinary at arm's length but rewards the collector who picks up a loupe. A mismatched Philippine-era mintmark punch, sideways D and S impressions corrected mid-die, hub-doubling on the Philadelphia obverse — all waiting to be found in dealer bins and inherited jars. See the complete 1945 Mercury Dime base value guide →
1945 Mercury Dime Specifications, Mintage & Baseline Value
| Parameter | Specification |
|---|---|
| Series | Mercury Dime (Winged Liberty Head), 1916–1945 — final year of issue |
| Designer | Adolph A. Weinman (obverse and reverse) |
| Composition | 90% Silver, 10% Copper (standard U.S. coin silver; unchanged from pre-war) |
| Weight | 2.50 grams (tolerance ±0.097 g) |
| Diameter | 17.9 mm |
| Edge | Reeded (118 reeds) |
| Silver Content | 0.07234 troy oz — establishes a melt-value floor for all grades |
| Proof Coins Issued | No proof coins were struck in 1945 |
Mintage by Facility
| Mint | Mintmark | Total Mintage | Strike Character | Key Varieties |
|---|---|---|---|---|
| Philadelphia | None | 159,130,000 | Notoriously weak; mushy centers; <2% earn Full Bands | DDO FS-101 |
| Denver | D | 40,245,000 | Generally sharp; distinct mintmark | RPM FS-501, FS-502 (D/Horizontal D) |
| San Francisco | S | 41,920,000 | Variable; Micro S dies often weakly struck | Micro S FS-512, RPM FS-503 (S/Horizontal S) |
📍 Mintmark Location
On the reverse, bottom-right, between the word ONE and the olive branch stem. Philadelphia coins have no mintmark. A 10× loupe is essential for examining the mintmark area.
Weight diagnostic: The standard 2.50 g weight helps authenticate planchet errors. A coin that is significantly lighter may be a rolled-thin planchet; a copper-colored coin weighing ~3.11 g is likely a wrong-planchet error.
View the complete 1945 Mercury Dime value guide (all grades, no varieties) →
1945 Mercury Dime Error Quick Checks: What to Look For
Grab a 10× loupe and work through these checks. Green cards identify potentially valuable varieties; the red card flags a common worthless look-alike.
S-Mint: Micro S Mintmark (FS-512)
The S mintmark on the reverse, between ONE and the olive branch stem at lower right.
The S appears noticeably smaller and seems "lost" in the field with a visible halo of empty metal around it. The serifs (the tiny feet at the ends of the letter) are sharp and crisp — think Times New Roman — not round or knob-like.
A weakly struck Normal S may look smaller, but its serifs remain rounded or knobbed. Focus on serif shape, not just overall size. Round serifs = Normal S. Sharp or split serifs = Micro S.
D-Mint: D over Horizontal D RPM (FS-502)
Inside the primary upright D mintmark on the reverse. Look for structure crossing horizontally through the letter.
The curve of an underlying sideways (horizontal) D running crosswise inside the upright D. The serifs of the hidden D may protrude from the vertical bar. A Repunched Mintmark (RPM) occurs when a mintmark was punched at the wrong angle, then corrected with a second punch.
Die scratches or debris inside the D. The horizontal impression must show clear structural elements of a rotated letter — not random marks or pitting.
S-Mint: S over Horizontal S RPM (FS-503)
The S mintmark on the reverse. Focus on the top and bottom loops (curves) of the S.
Curves of a secondary horizontal S protruding from the top and bottom loops of the primary S — often appearing as "horns" or extra thickness on the curves. More subtle than the Denver counterpart.
Die deterioration causing a thickened or mushy mintmark. Genuine RPM protrusions follow the structural curve of a rotated S letterform, not random swelling.
Philadelphia: Doubled Die Obverse — DDO FS-101
The date "1945" and the motto "IN GOD WE TRUST" on the obverse (front). Also check Liberty's profile for thickening. A Doubled Die Obverse (DDO) happens when the die shifts between hub-pressing operations, embedding two slightly offset images.
Distinct notching or splitting on the letter corners in IN GOD WE TRUST. Thickening and separation visible on the numerals 1945. The secondary image is rounded and raised, not flat.
Machine Doubling (MD) shows flat, shelf-like smearing — the metal looks pushed sideways. MD adds ZERO premium. True DDO shows rounded, raised doubling with split serifs, not a stepped shelf effect.
D-Mint: D/D Northeast RPM (FS-501)
The D mintmark on the reverse. Check for a ghost D to the upper right (northeast) of the primary D.
A clear secondary D impression shifted to the northeast. The outline of the underlying D should be visible as a distinct offset — not a fuzzy haze, but a recognizable letter shape.
Die deterioration causing a thickened or blurry mintmark. The secondary image must show a clear, separate letter outline rather than random swelling. This is an excellent, affordable entry point for RPM collecting.
All Mints: Full Bands (FB) Strike Quality
The two central horizontal bands on the fasces (the bundle of rods) on the reverse. These are the highest point of the design and the hardest area to fully strike.
Both center bands must be completely separated with a rounded contour and no interruption in the dividing line. Even a tiny merger disqualifies FB status. This standard is called Full Bands (FB) by PCGS or Full Split Bands (FSB) by NGC.
Partial band separation or bands that merge anywhere along their length. On 1945-P coins, wartime die erosion means fewer than 2% qualify. FB is a five-figure rarity for Philadelphia — an MS67 without bands might sell for $85–$100; with FB it enters a completely different market.
⚠️ TRAP: Machine Doubling (MD) — Not Valuable
The date, lettering, and Liberty's profile on the obverse. MD is the most common reason collectors mistakenly believe they have a DDO.
Any doubling that appears flat and shelf-like, as if the metal was pushed or smeared to one side. The duplicated element looks sunken or stepped, not rounded and raised.
MD = flat, mechanical smearing. True DDO = rounded, raised, split serifs. If you can flatten a piece of paper against the doubled element and it seems to lay flat — it's MD. Value: zero premium above silver melt. See full traps guide →
1945 Mercury Dime Value Table: Errors, Varieties & Grades
Baseline Values by Mint (No Variety)
| Coin | G–VG | F–VF | MS60–63 | MS65 | MS65 FB |
|---|---|---|---|---|---|
| 1945-P (Philadelphia) | $3 | $4 | $15 | $35 | $10,000+ (extreme rarity) |
| 1945-D (Denver) | $3 | $4 | $20 | $55 | $75 |
| 1945-S (San Francisco) | $3 | $4 | $20 | $50 | $125 |
Silver melt floor: 0.07234 troy oz of silver per coin — minimum value regardless of grade. All prices are retail estimates as of 2025.
Variety & Error Value Matrix
| Error / Variety | Designation | Mint | Rarity | Value Range | Auction Record |
|---|---|---|---|---|---|
| Micro S | FS-512 | S | Conditional Rarity | $15–$10,000+ | $25,850 (MS68 FB) |
| S/Horizontal S RPM | FS-503 | S | Very Rare (R-6.2 high grade) | $100–$4,500+ | — |
| D/Horizontal D RPM | FS-502 | D | Scarce | $35–$600 | — |
| Doubled Die Obverse | FS-101 | P | Scarce | $330–$1,706+ | $1,706.25 (MS66 CAC) |
| D/D Northeast RPM | FS-501 | D | Collectible | $50–$100 (MS) | — |
| Off-Center Strike | — | All | Uncommon | $460+ (10%, MS63) | — |
| Clipped Planchet | — | All | Common | $30–$250 | — |
| Wrong Planchet | — | All | Extremely Rare | $2,000–$10,000+ | — |
1945 Mercury Dime Rare Varieties & Valuable Errors Explained
1945-S Micro S (FS-512 / IMM-001)
Normal S (left) has rounded, knob-like serifs. Micro S (right) shows sharp, crisp serifs with a visible halo of empty metal surrounding the smaller punch.
Origin & Background
The Micro S punch was not intended for U.S. domestic coinage. Forensic numismatic research traced it to an obsolete mintmark punch originally manufactured for Philippine coinage struck at San Francisco (1907–1920 era). In the production chaos of 1945, a mint employee retrieved this forgotten punch from storage and used it to hand-punch the mintmark into multiple working dies. The variety was first spotted by collectors in 1947.
Roughly one-third of 1945-S dies were impressed with the Micro S punch, implying a production run of approximately 14 million coins. Yet PCGS estimates only about 30,000 survive across all grades — a survival rate crushed by silver recycling and coin roll attrition.
How to Identify
- Use a 10× loupe. Focus entirely on the S mintmark at the lower right of the reverse.
- Size: The Micro S appears "lost" in the field — a significant halo of empty metal surrounds it on all sides. The Normal S fills the space more assertively.
- Serif shape (the smoking gun): Micro S serifs are sharp and crisp, resembling a printed typeface. Normal S serifs are round, bulbous, or knob-like.
- Proportions: The Micro S is more compact both vertically and horizontally than the standard punch.
False Positives to Avoid
A weakly struck Normal S may appear smaller under a loupe, but its serif shape remains rounded or knobbed regardless of strike weakness. Always examine serif structure first — size alone is unreliable. The Micro S is also notorious for weak band strikes; only 10–12% of Mint State examples qualify for the Full Bands (FB) designation.
Market Values
- VF–XF: $15–$25 (accessible cherrypick)
- AU55: $40–$50
- MS63: $55–$75
- MS65: $135–$175 (high liquidity)
- MS66 FB: $1,500–$2,000 (investment grade)
- MS67+: $10,000+
Auction Record
$25,850 for MS68 FB (Legend Rare Coin Auctions, 2019). Attribution: PCGS CoinFacts FS-512 FB | GreatCollections Knowledge Base.
1945-D D over Horizontal D RPM (FS-502)
Inside the upright D: the crossbar of a previously punched horizontal D is visible running across the letter's interior bowl.
Origin & Background
During die preparation, mintmarks were applied by hand with a mallet and punch. For this variety, the employee initially punched the D sideways (rotated 90°), recognized the mistake, and then punched the D correctly in an upright position. The first impression was too shallow to erase with the second strike, leaving a permanently doubled, cross-oriented image inside the mintmark.
How to Identify
- At 10× magnification, look inside the bowl of the primary upright D mintmark.
- You should see the curve of the horizontal D running crosswise — as if a D was tipped on its back inside the standing D.
- The serifs of the underlying horizontal D may protrude from the vertical bar of the primary D, appearing as small bumps or extensions.
- Attribution codes: FS-502 (Fivaz-Stanton), RPM-006 (CONECA). Reference: Variety Vista RPM 1945-D.
False Positives to Avoid
Die scratches or debris inside the D. A genuine horizontal D impression shows structural elements consistent with a rotated letter — the curve of the letter's bowl, not random incuse marks or pitting.
Market Values
- VF–AU: $35–$60 (popular cherrypick in dealer bins)
- MS65: $500–$600
Auction Record
Specific realized auction records not available for this variety; circulated examples with confirmed attribution regularly sell at significant premiums confirming strong collector demand. See: PCGS CoinFacts 1945-D.
1945-S S over Horizontal S RPM (FS-503)
Top and bottom loops of the S showing horn-like protrusions — the curves of a previously punched horizontal S pressing through the primary upright S.
Origin & Background
A parallel to the Denver FS-502, this error occurred at San Francisco when an inverted or horizontal S was punched first, followed by a correctly oriented upright S. Though slightly more subtle than the Denver equivalent, FS-503 is considerably rarer in high grades — some sources rate it R-6.2 (very rare) in gem condition.
How to Identify
- At 10× magnification, examine the top and bottom loops of the S mintmark.
- Look for curves of a secondary horizontal S protruding as "horns" or extra thickness on the curves of the primary S.
- The protrusions follow the structural arc of a rotated S letterform — not random swelling caused by die wear.
- Attribution codes: FS-503, RPM-003. Reference: Variety Vista RPM 1945-S.
False Positives to Avoid
Die deterioration on the S mintmark can produce a thickened, mushy appearance. A genuine RPM shows structured secondary letter curves; die deterioration produces shapeless swelling without any semblance of a letter outline.
Market Values
- XF–AU: $100+
- MS65: $2,500–$4,500 (listed retail, realized prices typically $2,000–$3,000 depending on eye appeal)
Auction Record
A PCGS XF-45 example (ex: A.R. Savino Collection) sold through GreatCollections confirming collector demand for even circulated examples. MS65 retail is listed at approximately $4,500 via L&C Coins.
1945-P Doubled Die Obverse (FS-101)
Left: Normal 1945-P date with clean numeral edges. Right: DDO FS-101 showing thickening and separation on 1945 numerals and split serifs on IN GOD WE TRUST.
Origin & Background
A Doubled Die Obverse is created during the "hubbing" process, where a master hub presses the design into a working die. If the die shifts slightly between hub squeezes, the design is embedded twice at slightly different angles — creating a doubled image baked permanently into every coin struck from that die. FS-101 is a Class I (Rotated Hub) doubling on the Philadelphia obverse die.
How to Identify
- The date "1945": Look for thickening and separation visible on the numerals at 10× magnification.
- Motto "IN GOD WE TRUST": Distinct notching or splitting on the corners of the letters. The secondary image is rounded and raised.
- Liberty's profile: May appear slightly thickened overall.
- Attribution codes: FS-101, DDO-001.
False Positives to Avoid
Machine Doubling (MD) is the critical look-alike. MD shows flat, shelf-like smearing — the doubled element appears sunken or stepped, as if the metal was pushed sideways by mechanical bounce. True DDO FS-101 shows rounded, raised secondary images with split serifs, not flat shelves. MD carries zero premium; DDO FS-101 commands hundreds of dollars in Mint State. When in doubt, compare your coin to the reference: PCGS variety education.
Market Values
- MS65: $330–$450
- MS66: $1,000+
- MS66 CAC: $1,706.25 (recent Buy It Now sale)
Auction Record
$1,706.25 for MS66 CAC — see the GreatCollections listing (DDO FS-101 PCGS MS-66 CAC Green). The CAC (Certified Acceptance Corporation) seal indicates the coin meets a higher standard of quality within its grade, amplifying the premium.
1945-D D/D Northeast RPM (FS-501)
D/D Northeast: the outline of a secondary D punch is visible shifted to the upper-right of the primary upright D mintmark.
Origin & Background
A classic D/D RPM where the initial punch landed slightly to the northeast of the intended position. The second strike produced the primary D but the first impression remained visible as an offset ghost. Easier to attribute than FS-502 and more affordable, making it an excellent starting point for RPM collecting.
How to Identify
- At 10×, look for a secondary D outline shifted to the upper right (northeast) of the primary D.
- The outline should be a clear, distinct offset — recognizable as a letter shape, not random haze.
- Attribution codes: FS-501 (Fivaz-Stanton), RPM-001 (CONECA).
False Positives to Avoid
Die deterioration producing a thickened or fuzzy mintmark. The northeast shift must show a clear, separate letter outline rather than an undefined blob of metal.
Market Values
- Mint State: $50–$100
Auction Record
Specific high-grade realized record not established in available data. Regularly found in dealer stock at a meaningful premium over baseline 1945-D values.
1945 Mercury Dime Off-Center Strikes
An off-center dime with the design shifted, leaving a crescent of blank silver on one side. Date visibility is essential to value.
How to Identify
The coin's design is not centered on the planchet. A crescent of blank metal is visible on one side while the design is cut off on the opposite side. Off-center strikes occur when the planchet was not properly seated in the collar before the hammer die came down.
Value Factors
- Percentage off-center: Greater displacement means higher value. A 50% off-center is worth more than a 10% shift.
- Date visibility: A coin with the full date showing is worth significantly more than one where the date is clipped off.
- Grade: Higher Mint State grades command premiums.
Market Values
- ~10% off-center, MS63: $460+
- More dramatic percentages with date present: higher premiums apply.
1945 Mercury Dime Clipped Planchets
Clipped planchet showing the curved bite missing from the edge (left) and the Blakesley Effect — a weakened rim area directly opposite the clip (right arrow).
How to Identify
A curved section is missing from the coin's edge, as if a bite was taken out. This happens when the planchet punching machine stamps a new planchet overlapping a hole left by a previously punched blank.
The Blakesley Effect (Key Authentication Test)
Look for a weakness or flatness in the rim directly opposite the clip. This is caused by the missing metal disrupting metal flow during the strike. Genuine clips show this effect; post-mint damage from cutters does not — and post-mint damage edges are rough or jagged, not smooth.
Market Values
- Common clip: $30–$60
- MS65 clip: $250
1945 Mercury Dime on Wrong Planchet
A dime struck on a cent planchet: the coin appears copper-colored and weighs approximately 3.11 g instead of the standard 2.50 g.
How to Identify
- A dime with copper coloring (struck on a cent planchet) or significantly wrong weight.
- Weigh the coin: A cent planchet weighs approximately 3.11 g; the standard dime weighs 2.50 g. This is the definitive test.
- The design may appear incomplete because the wrong planchet is a different size, so the dies do not fully capture the design.
False Positives to Avoid
Environmental toning or post-mint copper plating can discolor a silver coin. Always verify by weight — a genuine wrong planchet will have the incorrect weight of the host planchet, not 2.50 g. Use a precision digital scale accurate to 0.01 g.
Market Values
- All grades: $2,000–$10,000+ depending on grade and eye appeal. Professional authentication is essential before sale.
1945 Mercury Dime Traps: Worthless Errors vs. Real Varieties
These four mistakes cost collectors money every day. Learn to recognize them before spending — or before passing on a real find.
Machine Doubling (left) shows flat, shelf-like smearing. True DDO (right) shows rounded, raised doubling with split serifs — a completely different effect.
⚠️ Machine Doubling (MD) — The #1 Misidentified Error
The date, motto, or Liberty's profile appears doubled or smeared. Looks promising under a loupe.
The die chatters or bounces mechanically during striking, pushing softened metal sideways. It is NOT a second hub impression — it happens at striking, not die preparation.
- The doubled image is flat and shelf-like — it looks pushed, not pressed.
- There is no rounded raised secondary image; the "double" is below the surface level of the primary design.
- Serifs appear stepped, not split.
- True DDO FS-101 shows rounded, raised doubling with split serifs and costs hundreds of dollars more. MD costs exactly $0 extra.
Value: Silver melt floor only — no numismatic premium.
⚠️ Die Deterioration Doubling (DDD) — Fuzzy but Fake
Soft, fuzzy, shelf-like "doubling" on letters or the date. Common on 1945-P coins due to overworked wartime dies.
As dies wear beyond their intended lifespan, the design edges erode and flow outward, creating a distorted secondary look that mimics doubling.
- The "doubling" is flat and undefined — no crisp secondary letter edges.
- The entire coin often looks softly defined or "mushy" not just one area.
- True DDO shows isolated, crisp, rounded separation on specific elements.
Value: Face value only. 1945-P is notorious for this — it's a feature of the era, not an error of value.
⚠️ Cleaned or Polished Coins — Destroys Value
An unusually bright, brilliant silver coin, sometimes with hairline scratches visible under angled light.
Previous owners polished the coin to make it look "nicer", unknowingly destroying the original mint luster and market value.
- Hairline scratches visible in the fields (flat areas) under angled light.
- Unnaturally bright, "artificial" shine without the cartwheel luster of an original Mint State coin.
- PCGS and NGC will label cleaned coins as "Details" grades (e.g., "MS63 Details — Cleaned"), which drastically reduces value.
Value: Significantly reduced — often near silver melt regardless of grade potential.
⚠️ Post-Mint Damage — Looks Like an Error
A coin with bent edges, cut sections, gouges, or an unusual shape that might resemble a clip or off-center strike.
The coin was damaged after leaving the mint — dropped, hit with a tool, cut with pliers, or bent.
- Damaged edges are rough, jagged, or irregular — genuine mint clips have smooth, curved edges.
- No Blakesley Effect (rim weakness opposite a clip). If the coin is missing metal without that opposing weakness, it's likely post-mint damage.
- Gouges or flat spots on the face are always post-mint — striking errors affect the entire design layout, not isolated spots.
Value: Silver melt floor only.
1945 Mercury Dime Grading & Full Bands Value Guide
For 1945 Mercury Dimes, grade (the coin's condition on the 1–70 scale) matters enormously — but strike quality often matters more. A coin graded MS67 without Full Bands may be worth $85–$100. The exact same coin with Full Bands enters a completely different market tier.
The Full Bands (FB) Standard Explained
Left: No Full Bands — center bands merge at one or more points due to die erosion. Right: Full Bands — both center bands are fully separated with rounded, uninterrupted contours throughout.
The two central horizontal bands on the fasces (the bundle of rods on the reverse) are the highest point of the coin's design. Because of this, they are the hardest area to fully strike up. To qualify for the Full Bands (FB) designation from PCGS — or Full Split Bands (FSB) from NGC — both center bands must be:
- Completely separated across their entire length
- Show a rounded, three-dimensional contour
- Have no interruption or merging in the dividing line
The 1945-P is notoriously difficult in FB. Wartime die erosion — from running dies far past their intended lifespan — created "mushy" center details on the vast majority of Philadelphia coins. Fewer than 2% of surviving 1945-P examples qualify for Full Bands. As a result:
| Coin | MS67 (No FB) | MS67 (FB) |
|---|---|---|
| 1945-P | $85–$100 | Five-figure rarity |
| 1945-D | Moderate premium | $75+ at MS65 FB |
| 1945-S Micro S | $600+ | $10,000+ (MS67 FB) |
The all-time auction record for a 1945 Mercury Dime is $96,000 for a 1945-P MS68 FB — demonstrating how the combination of perfect grade and Full Bands creates trophy-level desirability.
Toning note: 1945-S coins are prized for rich, rainbow toning. A "monster toned" Micro S in MS66 can outsell an untoned MS67 example — eye appeal is a legitimate value multiplier in the Mercury Dime market.
1945 Mercury Dime Authentication: Certifying Valuable Errors
Professional third-party grading (TPG) by PCGS or NGC serves two functions for 1945 Mercury Dimes: it confirms the variety attribution and assigns a market-accepted grade. For any coin where the variety designation drives the value — Micro S, Horizontal RPMs, DDO — authentication is not optional; it's financially essential.
When to Submit
- Micro S (FS-512): Submit any example you believe qualifies. The attribution premium alone (3×–10× over Normal S) justifies the submission fee in Mint State.
- Horizontal RPMs (FS-502, FS-503): Both are high-value varieties where slab attribution is required for maximum sale price.
- DDO FS-101: Machine doubling is common; a TPG attribution slab eliminates buyer skepticism and unlocks the full premium.
- Possible Full Bands coins: Graders evaluate band separation under controlled lighting. Do not try to grade FB yourself — the line between "almost FB" and "FB" is worth thousands of dollars on a 1945-P.
- Wrong planchet or major mint errors: Always require TPG authentication.
Strategy Tips
- Do NOT clean the coin before submission — even touching it with bare hands can affect the surface assessment.
- Use the variety attribution services: PCGS and NGC both offer variety-specific designations that print on the slab label.
- For circulated Micro S examples, weigh submission costs against the value — VF examples at $15–$25 may not justify standard grading fees without the FB designation potential.
⚠️ Do Not Clean Your Coin
Cleaning — even with water or a soft cloth — permanently destroys the coin's natural surfaces and can result in a "Details" grade that eliminates the variety premium entirely. Valuable 1945 errors should be placed in a coin flip and examined without touching the faces.
Dealer directory and locator information: visit the PCGS or NGC dealer locator tools on their respective websites for certified coin specialists in your area.
1945 Mercury Dime Errors: Frequently Asked Questions
What makes the 1945 Mercury Dime so prone to errors?
Wartime production pressure at all three mints led to dies being used far longer than peacetime standards allowed. This created widespread die erosion (weak strikes) and human errors in the hand-punching of mintmarks, producing the Micro S, Horizontal RPMs, and DDO varieties that define the date.
How do I tell the Micro S from a Normal S?
Focus on serif shape under a 10× loupe. The Normal S has round, bulbous, or knob-like serifs. The Micro S has sharp, crisp serifs resembling a printed typeface. Size alone is unreliable because a weakly struck Normal S can appear smaller. Sharp serifs + visible halo of empty metal = Micro S.
What is the silver value of a 1945 Mercury Dime?
Every 1945 Mercury Dime contains 0.07234 troy oz of silver (90% silver composition). The melt value fluctuates daily with the silver spot price — multiply 0.07234 by the current spot price per troy ounce to find the floor value. Even the most worn examples are worth at least this amount.
Is my doubled coin a DDO or machine doubling?
True DDO FS-101 shows rounded, raised secondary images with split serifs — the doubling stands up off the coin. Machine Doubling (MD) shows flat, shelf-like smearing where the metal looks pushed sideways — the "double" is actually below the surface level. MD adds zero value. If the doubled elements are flat and stepped, it is almost certainly MD.
Why is the 1945-P Full Bands so rare?
Philadelphia's massive production volume (159+ million coins) required using each die for enormous numbers of strikes. The dies eroded to the point where the highest-relief area — the central fasces bands — could not be fully struck up. It is estimated fewer than 2% of surviving 1945-P coins qualify for Full Bands designation, making MS65 FB and higher a genuine rarity with five-figure values.
Where did the Micro S punch come from?
The Micro S punch was originally manufactured for Philippine coinage struck at the San Francisco Mint (from approximately 1907–1920). In 1945, a mint worker inadvertently retrieved this obsolete punch from storage and used it to impress the mintmark into multiple working dies, linking U.S. domestic coinage to its colonial-era Philippine operations.
Can I find a Micro S in circulation or a dealer bin?
Yes — this is called "cherrypicking". Circulated Micro S dimes in VF–AU grades trade for $15–$50, while unattributed Normal S dimes in the same grades go for $3–$6. A 10× loupe and knowledge of the serif difference lets you identify the variety in unattributed lots. The Micro S is estimated at roughly 14 million coins produced, so it is findable — just requires knowing what to look for.
Do I need to have my error coin certified to sell it?
For most high-value varieties (Micro S, Horizontal RPMs, DDO FS-101, Full Bands coins), PCGS or NGC certification is strongly recommended. A slab with the variety attribution printed on the label eliminates buyer skepticism and typically results in a significantly higher realized price. Uncertified claims of rare varieties are discounted heavily in the market.
1945 Mercury Dime Research Sources
Values, diagnostics, and auction records in this guide are drawn exclusively from the following primary numismatic sources:
- PCGS — The Lowdown on the 1945-S Micro S Mercury Dime (survival estimates, auction record)
- PCGS CoinFacts — 1945-S Micro S FB (FS-512)
- PCGS Auction Prices — Mercury Dime 1916–1945 (auction records)
- GreatCollections Knowledge Base — 1945-S Micro S
- GreatCollections — DDO FS-101 PCGS MS-66 CAC (realized price)
- Variety Vista — RPMs 1945-D (FS-501, FS-502 diagnostics)
- Variety Vista — RPMs 1945-S (FS-503 diagnostics)
- Variety Vista — 1945-S IMM-001 (Micro S)
- MercuryDime.net — 1945 Mercury Dime with Full Bands
- NGC Coin Explorer — 1945 Mercury Dime MS
Values are retail estimates as of January 2025 and fluctuate with market conditions. Silver melt values change daily with the spot price.
A note on images: To help illustrate coin diagnostics and rare varieties — especially complex errors that are difficult to describe in text alone — this guide uses AI-generated images. All written values, diagnostics, and variety attributions have been manually reviewed against the cited sources above. While our editorial team works to ensure every image is accurate and helpful, AI-generated illustrations may occasionally misrepresent fine details. If you spot any discrepancy between an image and its written description, please contact us or leave a comment below — we review all feedback and correct errors promptly. Numismatic knowledge is a community effort, and your input helps us build a more accurate resource for everyone.
