1975 Roosevelt Dime Errors: Value Guide & Rare Varieties
The 1975 Roosevelt Dime produced one of the rarest modern U.S. coins—the No S Proof Dime worth $500,000+. Only 2 exist worldwide. Learn to identify it vs. common pocket change, plus off-center strikes, missing clad layer, broadstrike, and RPM errors with verified 2025 values.
Most 1975 Roosevelt Dimes are worth exactly 10¢, but this year produced the rarest modern U.S. coin ever discovered—the No S Proof Dime—with only 2 known examples, each worth over $500,000.
- 🔴 No S Proof Dime (2 known):$500,000–$600,000+ — mirror Proof finish, no mint mark
- 🟡 Off-Center Strike (40%+, date visible):$150–$400
- 🟡 Missing Clad Layer (copper-red one side):$150–$450
- 🟡 1975-S RPM-001 Repunched Mint Mark:$50–$100
- 🟢 Philadelphia & Denver business strikes, any circulated grade: Face value
⚠️ Critical warning: A missing mint mark on a 1975 dime is completely normal for Philadelphia—nearly 586 million were made that way. The $500,000 rarity requires a genuine mirror Proof surface finish, not just an absent mint mark.
1975 Roosevelt Dime Errors Error Checker
Check your coin for valuable errors and varieties
Values shown are typical retail estimates as of 2025-01 based on documented auction records and market data.
The 1975 No S Proof Dime is one of the rarest modern U.S. coins with only 2 authenticated examples. Professional authentication (PCGS/NGC) is absolutely mandatory for any potential specimen.
A 1975 dime without a mint mark is almost certainly a common Philadelphia business strike (585,673,900 minted). The absence of a mint mark alone does NOT indicate the No S Proof error — the coin MUST have mirror Proof surfaces.
Error coin values vary significantly based on grade, eye appeal, third-party certification, and current market conditions.
Machine Doubling (flat, shelf-like doubling) is NOT a valuable error variety and adds no premium.
Coins damaged in clothes dryers (dryer coins) are post-mint damage and have no numismatic premium.
Acid-dipped coins with exposed copper cores are damaged, not genuine missing clad layer errors. Weigh the coin to help differentiate.
One missed punch in a Philadelphia die shop created a modern numismatic legend. The 1975 Roosevelt Dime is—for nearly every collector—ordinary pocket change worth exactly ten cents. Nearly 900 million were struck that year across Philadelphia and Denver. Yet somewhere inside a handful of sealed 1975 Proof Sets, two dimes survived that should not exist: the 1975 No S Proof Dime, each now worth over half a million dollars. See standard 1975 Roosevelt Dime values → Or scroll down to find out if yours is one of them.
1975 Roosevelt Dime: Specs, Mintage & Series Context
The Roosevelt Dime series began in 1946. By 1975 it had transitioned from 90% silver to a clad composition—a copper core sandwiched between outer layers of copper-nickel. That means no precious-metal melt value. A circulated 1975 dime is worth its face value and nothing more, unless it carries a genuine error.
| Specification | Detail |
|---|---|
| Series | Roosevelt Dime (1946–present) |
| Composition | Copper-nickel clad (75% Cu / 25% Ni outer layers; pure copper core) |
| Weight | 2.27 grams |
| Diameter | 17.9 mm |
| Edge | Reeded (ridged) |
| Designer | John R. Sinnock |
| Melt Value | None (no precious metal) |
1975 Mintage by Facility
| Mint | Type | Mint Mark | Mintage |
|---|---|---|---|
| Philadelphia | Business Strike | None | 585,673,900 |
| Denver | Business Strike | D | 313,705,300 |
| San Francisco | Proof Strike | S | 2,845,450 |
| San Francisco | Error Proof (No S) | None (error) | 2 Known |
ℹ️ Why Philadelphia dimes have no mint mark
Philadelphia coins did not carry a "P" mint mark until 1980. In 1975, the absence of a mint mark on a dime simply means it came from Philadelphia—it is not an error. This is the most common source of confusion surrounding the 1975 dime.
For base-value data on the standard coin, see our full 1975 Roosevelt Dime value guide →
1975 Roosevelt Dime Quick Checks: Do You Have Something Valuable?
Work through these checks in order. Each describes exactly where to look and what a genuine valuable variety looks like—versus the common impostors that fool millions of people every year.
Left: Common 1975 Philadelphia business strike (satin luster). Right: The type of mirror-field Proof finish the No S Proof displays. The difference is dramatic under light.
Check 1 — 1975 No S Proof Dime (Only 2 Known Worldwide)
The coin's surface. Hold it under a bright light at a 45° angle and examine both the fields (the flat background areas) and Roosevelt's portrait. Also check for a mint mark just above the date—a No S Proof has none.
Mirror-like fields: You should be able to see a clear reflection of nearby objects in the flat background—like looking into a small mirror. Frosted portrait: Roosevelt's image appears white and matte, contrasting sharply with the reflective field. Squared rim: The rim meets the edge at nearly 90 degrees—sharp and high, like a tiny wall.
A common 1975 Philadelphia business strike. All 585,673,900 Philadelphia dimes lack a mint mark—that is completely standard, not an error. Business strikes have a satin or lustrous sheen with visible flow lines (swirling marks in the field), not a mirror reflection. Social media videos routinely omit the Proof surface requirement, misleading millions of viewers.
Check 2 — 1975-S RPM-001 (FS-501) Repunched Mint Mark
The "S" mint mark on the obverse (front), located just above the date. You will need a 10x loupe (magnifying glass) for this check.
A second, partial "S" image clearly protruding from the right (east) side of the primary S. This is called an S/S East variety. In 1975, mint marks were hand-punched by engravers, making repunching errors possible when the punch slipped or was struck twice at different positions.
General fuzziness or soft edges around the S from normal die wear. The secondary image must have a clear, defined edge—not just erosion of the letter. Only applies to S-mint Proof dimes.
Check 3 — Off-Center Strike
The overall design placement. Step back from the coin and see if the design is centered or shifted toward one side, leaving a blank crescent-shaped area on the opposite side.
A significant offset—ideally 40% or more—leaving a visible blank crescent where no design was stamped. The date must still be fully readable for maximum value. A documented example exists: a 1975 dime double-struck with the second strike 60% off-center, graded NGC AU-58.
Minor misalignment of under 5% where the full design is still present. Also not post-mint distortion from bending or damage—genuine off-center strikes show a clean, sharp blank area exactly where the die never touched the planchet.
Check 4 — Missing Clad Layer Error
The color of both sides of the coin. Then weigh it on a digital scale accurate to 0.01 grams.
One side is distinctly copper-red (like a penny) with a correspondingly weak strike, while the other side appears normal silver. The coin must weigh approximately 1.8–1.9 grams (normal clad dime = 2.27g). The copper surface must be smooth with mint luster—not pitted or corroded.
An acid-dipped or chemically damaged coin. Acids dissolve the outer nickel layer to expose the copper core, but these coins show pitted, uneven surfaces and degraded detail. A genuine mint error has smooth, sharp surfaces on the copper side.
Check 5 — Broadstrike Error
The coin's edge and overall diameter. Compare it directly to a normal dime and measure with calipers if available.
A coin noticeably wider than 17.9mm with a flat, undefined rim and completely absent edge reeding. The design should be centered or near-centered, with the portrait and legends sharp in the middle but spreading outward at the edges. The metal was squeezed outward when the collar die failed during striking.
A dryer coin—see Check 7 below. Dryer coins have mushroomed or rolled-in rims and are often the same size or smaller. A genuine broadstrike is physically larger than normal with relatively sharp central design details.
Check 6 — Machine Doubling (NOT Valuable — Very Common Trap)
The date, lettering, and design elements for any apparent doubling or echo of the design.
Nothing—this is a trap. Machine doubling (also called mechanical doubling or strike doubling) has zero numismatic value. No major doubled die varieties exist for the 1975 Roosevelt Dime. What you see is caused by the die shifting slightly during the strike, leaving a flat, shelf-like ghost image.
True (valuable) doubled dies show rounded secondary images with depth and separation—split serifs on letters, notched numerals. Machine doubling is flat, one-directional, and smeared-looking. If the doubling appears as a shelf with no depth, it is machine doubling and worth face value only.
Check 7 — Dryer Coin Damage (NOT Valuable)
The rim and edge, especially if the coin appears to lack reeding or has an unusual, battered rim profile.
Nothing—this is damage, not an error. Coins tumbled in clothes dryers are the most common imposter for broadstrikes. Heat and repeated mechanical impact mushroom the rim and flatten the edge reeding. This is post-mint damage with zero numismatic value.
A dryer coin is the same diameter as normal or slightly smaller, with rolled-in or mushroomed rims that curve inward. It may show friction wear and heat discoloration. A genuine broadstrike is physically wider than 17.9mm with sharp central details and no rim-to-edge transition.
1975 Roosevelt Dime Value Table: All Varieties at a Glance
Use this table as a quick reference. High-value rows link to the detailed Jackpots section below. Values reflect 2025 market estimates based on documented auction records.
| Error / Variety | Designation | Mint | Rarity | Value Range | Top Auction Record |
|---|---|---|---|---|---|
| Philadelphia Mint (No Mint Mark) | |||||
| 1975-P Business Strike — Circulated | — | P | Extremely Common | 10¢ (face) | — |
| 1975-P Business Strike — MS67 | — | P | Condition Rarity | $200–$880 | $880 (eBay, 2021) |
| Denver Mint (D Mint Mark) | |||||
| 1975-D Business Strike — Circulated | — | D | Extremely Common | 10¢ (face) | — |
| 1975-D Business Strike — MS67 FB | — | D | Condition Rarity | $430+ | $432 (Heritage, 2020) |
| San Francisco Mint (S Mint Mark — Proof) | |||||
| 1975-S Proof — Standard | PR69 DCAM | S | Very Common | $10–$20 | — |
| 1975-S Proof — Impaired (circulated) | — | S | Common | $1–$5 | — |
| 1975-S RPM-001 (FS-501) | FS-501 | S | Scarce | $50–$100 | — |
| 1975 No S Proof Dime ★ | PR67–PR68 | S (error) | 2 Known | $500,000–$600,000+ | $506,250 (2024) |
| Striking & Planchet Errors (All Mints) | |||||
| Off-Center Strike (40–60%) | — | P / D | Scarce | $150–$400 | Documented NGC AU-58 |
| Off-Center Strike (5–15%) | — | P / D | Common | $10–$30 | — |
| Missing Clad Layer | — | P / D | Scarce | $150–$450 | — |
| Broadstrike | — | P / D | Uncommon | $15–$50 | — |
FB = Full Bands (complete band separation on reverse torch). DCAM = Deep Cameo (strong frost/mirror contrast on Proof coins). Values are retail estimates; actual realized prices vary by grade, eye appeal, and certification.
1975 Roosevelt Dime Jackpots: Rare Errors Worth Real Money
1975 No S Proof Roosevelt Dime — The King of Modern Coins
Holding a Proof coin under angled light reveals mirror fields—you can see the reflection of your hand. A business strike shows only dull satin luster.
Origin & Background
All U.S. coinage dies were manufactured at the Philadelphia Mint in 1975. Critically, mint marks were not part of the master design—they had to be individually hand-punched into each working die by an engraver. Dies destined for San Francisco were also given a special polish to create the Proof finish (mirror fields and frosted devices). The error occurred when one such polished, Proof-finished die was shipped to San Francisco without receiving its "S" punch. The die was installed in a press and struck genuine Proof coins—with all the visual characteristics of a Proof—but with no mint mark. Mint inspectors discovered the error and the die was pulled. Coins already sealed in Proof Set packaging survived; the rest were melted. Only two sets containing the error dime are known to have escaped.
Proof rim (left) is sharply squared at nearly 90°. Business strike rim (right) is rounded and chamfered. The rim difference is visible without magnification.
How to Identify
- Mirror fields: Hold the coin under a bright light. The flat background areas must show a clear, sharp reflection of nearby objects—like looking into a small mirror. This should be visible from 6 inches away.
- Frosted portrait: Roosevelt's image, the lettering, and the torch on the reverse must appear white and matte, creating strong contrast with the mirror field. This is the "cameo" or "DCAM" effect.
- Squared rim: The rim meets the edge at a near 90-degree angle—sharp and high. Business strike rims are rounded and chamfered.
- No mint mark: The obverse above the date must be blank—no "S," "D," or "P."
- Standard weight: 2.27 grams on a precise scale (it is a Proof coin on a normal clad planchet).
False Positives to Avoid
This is the single most common misidentification in modern numismatics. Social media content routinely shows a 1975 dime with no mint mark and implies it is worth $500,000—omitting that the coin must have genuine Proof surfaces. The 585,673,900 Philadelphia business strikes that also lack a mint mark are worth 10 cents each. If your coin does not have mirror fields and a frosted portrait, it is not the rarity, regardless of the missing mint mark. Also beware of altered coins: dishonest sellers sometimes remove the "S" from a standard 1975-S Proof. An altered coin will show tool marks under magnification around the former mint mark location.
The Two Known Specimens
Specimen 1 — The "Fresno" Coin: Discovered in 1977 by a California collector who found it in his 1975 Proof Sets. Sold to dealer Fred Vollmer in 1978. First public auction: $349,600 (Stack's Bowers, August 2011). Resold at Heritage Auctions, September 2019: $456,000. Days later, flipped via private treaty to a Roosevelt Dime specialist for $516,000. Current grade: PCGS PR68.
Specimen 2 — The "Ohio Sisters" Coin: Purchased in 1978 by an Ohio family from F.J. Vollmer & Co. for $18,200 (≈$90,000 in 2024 dollars). Stored in a bank safety deposit box for over 40 years. Inherited by three sisters after their brother's passing. Authenticated as PCGS PR67 with a CAC (Certified Acceptance Corporation) sticker. Sold by GreatCollections in October 2024 for $506,250—a new public auction record.
The "Ohio Sisters" coin was stored in a bank safety deposit box for over 40 years before selling for $506,250 in 2024—one of the great hidden-treasure stories in numismatic history.
Market Values
- • PR67 CAC:$506,250 (2024 auction record)
- • PR68:$456,000–$516,000 (2019 auction + private treaty)
- • PR68:$349,600 (2011 — first public sale)
- • Projected floor: $500,000+ based on consistent appreciation
Auction Record
$506,250 for PCGS PR67 CAC (GreatCollections, October 2024). This is the "Ohio Sisters" coin—the most recent public sale of either known specimen.
⚠️ Mandatory Authentication Warning
No transaction involving a potential 1975 No S Proof Dime should ever occur without certification from PCGS (PCGS #5254) or NGC. Do not clean, polish, or excessively handle the coin. Place it in a protective flip immediately. The two known specimens are both encapsulated in PCGS holders.
1975-S RPM-001 (FS-501) — Repunched Mint Mark
RPM-001: a secondary S protrudes from the right (east) side of the primary S mint mark. Clearly visible under 10x magnification.
Origin & Background
In 1975, mint marks were hand-punched into individual working dies by Mint engravers using a mallet and a small steel punch. When the punch struck at a slightly different angle or position on a second blow, the die retained the ghost of both impacts—creating a Repunched Mint Mark (RPM). The 1975-S RPM-001 (FS-501) shows the "S" shifted East, meaning the secondary impression protrudes to the right of the primary.
How to Identify
- Applies only to 1975-S Proof dimes with a visible S mint mark above the date.
- Under 10x magnification: a partial secondary S is clearly visible emerging from the right (east) side of the primary S.
- The secondary image has a defined, sharp boundary—not fuzzy general erosion.
- Advanced specialists can confirm using known die markers (e.g., UVC-583, DMR-002) from variety databases.
False Positives to Avoid
Normal die wear and die deterioration can soften the edges of the S mint mark, making it look slightly irregular. This is not an RPM. The secondary image must have a clearly defined, distinct edge that reads as a partial S shape—not just general fuzziness around the letter. For reference, see the Variety Vista 1975-S RPM listings and PCGS CoinFacts entry #395128.
Market Values
- • PR69 DCAM:$50–$100
Auction Record
No individual public auction record documented in current data. The FS-501 variety is a liquid, in-demand coin that trades regularly in the $50–$100 range in top grade, serving as an accessible entry point for collectors wanting a special 1975-S variety.
1975 Roosevelt Dime Off-Center Strike
A dramatic 60% off-center strike leaves a large blank crescent. The date remains readable, maximizing value.
Origin & Background
An off-center strike occurs when the planchet (blank coin disc) is not properly seated inside the collar die before the obverse and reverse dies impact it. The design is only stamped onto the portion of the planchet that lay beneath the dies, leaving a blank crescent-shaped area. A documented 1975 example exists: a dime double-struck, with the second strike 60% off-center, graded NGC AU-58 (sold via GreatCollections).
How to Identify & Value
- Estimate the percentage offset by measuring how much design is missing versus the total coin face.
- Date must be visible for maximum value—a dateless off-center dime trades as a generic type coin ($20–$40).
- The blank crescent area should be smooth and clean, not distorted by post-mint damage.
Value Matrix
- • Minor (5–15% off-center):$10–$30 — common, modest premium
- • Major (40–60% off-center, date visible):$150–$400 — dramatic and desirable
- • Dateless off-center:$20–$40 — type coin only
False Positives to Avoid
Minor die misalignment under 5% where the entire design is still present adds little value. Post-mint bending or distortion is not an off-center strike—look for the clean, flat blank crescent that characterizes a genuine mint error.
Auction Record
1975 dime double-struck, second strike 60% off-center — graded NGC AU-58 (GreatCollections, documented).
1975 Roosevelt Dime Missing Clad Layer Error
Left: normal silver-colored reverse. Right: missing clad layer exposes the pure copper core—distinctly red-brown like a penny.
Origin & Background
The clad strip used to make dime planchets is manufactured by bonding copper-nickel sheets to a pure copper core under high pressure. Occasionally, the bonding fails—a roller runs out of cladding material, or a section of the strip never received its outer layer. When such a defective planchet is fed into the press, it produces a coin missing one clad layer. The exposed copper side is visually striking: a bright copper-red color completely unlike a normal dime.
How to Identify
- Visual check: One side distinctly copper-red; the other normal silver. The design on the copper side will typically appear weaker (shallower) because the planchet is thinner than specification.
- Weight test: A standard clad dime weighs 2.27 grams. A dime missing one clad layer weighs approximately 1.8–1.9 grams. Use a digital scale accurate to 0.01g.
- Surface quality: Smooth, mint-quality luster on the copper side—no pitting, roughness, or corrosion.
False Positives to Avoid
Acid-dipped coins are the primary imposter. Mild acids dissolve the nickel outer layer, revealing the copper core. These damaged coins have pitted, uneven surfaces and degraded detail. Environmental toning and heavy corrosion can also alter color. Always verify with the weight test and surface quality check before drawing conclusions.
Market Values
- • MS63:$150–$250
- • MS65:$350–$450
Auction Record
Mid-1970s Roosevelt Dime missing clad layer examples (including 1974-D and 1975) have documented sales in the $150–$450 range depending on grade and eye appeal.
1975 Roosevelt Dime Broadstrike Error
Left: genuine broadstrike—wider than 17.9mm, flat rim, no reeding, sharp central detail. Right: dryer coin damage—rolled rim, friction wear, normal or smaller diameter.
Origin & Background
A broadstrike occurs when the collar die—the ring that retains the planchet during striking and forms the reeded edge—fails to deploy or breaks. Without the collar, the metal from the planchet is free to flow outward when the obverse and reverse dies strike it. The result is a coin significantly wider than the standard 17.9mm diameter, with flat, undefined rims and no edge reeding.
How to Identify
- Measure diameter with calipers—must exceed 17.9mm.
- Rim is flat or completely nonexistent, with no trace of reeding on the edge.
- Design is centered or nearly centered; details in the center remain relatively sharp.
- The periphery shows spreading and distortion as the metal flowed outward.
False Positives to Avoid
Dryer coins are the single most common imposter. A coin tumbled in a clothes dryer suffers heat and mechanical impact that mushrooms the rim inward or rolls it flat. These coins are typically the same diameter or smaller than normal, show friction wear and possible heat discoloration, and have mushed-looking detail. A genuine broadstrike is physically larger than normal.
Market Values
- • Broadstrike (any grade, identifiable): $15–$50
Auction Record
No specific auction record on file for this exact date/type. Value range based on Roosevelt Dime broadstrike market data for the mid-1970s era.
1975 Roosevelt Dime Traps: Common Misidentifications Worth Nothing
The 1975 dime is surrounded by more misinformation than almost any other modern coin. These two traps account for the vast majority of disappointed "discoveries."
⚠️ Machine Doubling (Mechanical Doubling / Strike Doubling)
A second, slightly offset image of the date, lettering, or portrait. Can appear to be significant doubling at first glance—especially under magnification.
The die shifts or chatters slightly during the actual strike, impressing the design elements a second time with a slight offset. This is entirely mechanical, unrelated to die preparation, and occurs on an enormous percentage of coins from this era.
- The doubling is flat and shelf-like—the secondary image has no depth and does not rise above the primary.
- The ghost image faces the same direction as the primary (one-directional shift).
- Surfaces look smeared or dragged rather than showing a clean, separate impression.
- No major doubled die varieties (DDOs or DDRs) are documented for the 1975 Roosevelt Dime. Any doubling you see is almost certainly machine doubling.
Value: Face value only. No premium whatsoever.
Machine doubling (left) shows a flat, shelf-like ghost with no depth. A true doubled die (right, different coin shown for comparison) has rounded, separated images with depth.
⚠️ Dryer Coin Damage
A coin with a flat, battered-looking rim and missing or severely degraded edge reeding. May appear to have no reeded edge at all, resembling a broadstrike.
Coins trapped in the fins of a commercial or domestic dryer tumble repeatedly, taking mechanical impacts and heat. The constant pounding rolls the rim inward or mushrooms it flat, wearing down the edge reeding through friction.
- Dryer coins are the same diameter or smaller than a normal dime—a genuine broadstrike is larger than 17.9mm.
- The rim may curve inward or have an unusual mushroomed profile from repeated impact.
- The coin often shows friction wear, heat discoloration, or a dull appearance from tumbling.
- Dryer coin details in the center are typically mushy and degraded; a genuine broadstrike retains sharp central detail.
Value: Face value only. Post-mint damage has no numismatic premium.
1975 Roosevelt Dime Grading: How Condition Dramatically Affects Value
Coins are graded on the Sheldon scale from 1 (barely identifiable) to 70 (perfect). For the 1975 Roosevelt Dime, grade is the dividing line between pocket change and a collectible coin.
| Grade Category | Description | 1975-P Value | 1975-D Value |
|---|---|---|---|
| Circulated (G-AU) | Any wear on high points | 10¢ | 10¢ |
| MS60–MS65 (Uncirculated) | No wear; may have bag marks | $1–$5 | $1–$5 |
| MS66–MS66 FB | Near-perfect; few minor marks | $10–$50 | $10–$50 |
| MS67 (Condition Rarity) | Virtually flawless surfaces | $200–$880 | — |
| MS67 FB (Full Bands) | Flawless + complete band separation | Virtually non-existent | $430+ |
Full Bands (FB) is a designation awarded when the horizontal bands on the torch (reverse) are completely and cleanly separated—top from middle, and middle from bottom. Achieving this on 1975 coins is extremely rare due to the weak strike characteristics of the era. Why is MS67 so rare? The 1970s Mint transported coins in canvas bags where they collided constantly, leaving tiny bag marks. Finding a 1975 dime with truly flawless surfaces is genuinely difficult despite the high mintage.
1975 Roosevelt Dime Authentication: When and Why to Get Certified
Third-party grading (TPG) by PCGS or NGC encapsulates a coin in a tamper-evident plastic "slab" with an official grade and attribution. For the 1975 dime, certification is essential in specific situations.
When You Must Get Certified
- Any suspected No S Proof Dime: Mandatory, no exceptions. Both known specimens are PCGS-certified. No serious buyer will transact without a slab. Do not clean or polish the coin under any circumstances.
- Missing clad layer errors: Certification confirms the error is genuine, not acid damage. Weight alone is not sufficient for a buyer to be confident without a TPG opinion.
- Major off-center strikes (40%+): Certification adds liquidity and buyer confidence, especially for strikes worth $150+.
- Business strikes grading MS67 or above: At this value level, certification pays for itself.
When Certification Is Optional
- Minor errors (small off-center, broadstrikes) worth under $50—certification fees may exceed the coin's value.
- Standard 1975-S Proof dimes in PR69 DCAM ($10–$20 range)—not cost-effective.
- 1975-S RPM-001 in lower grades—evaluate whether the premium justifies the fee.
TPG Strategy
Both PCGS and NGC are the industry-standard services. For the No S Proof specifically, PCGS has certified both known specimens (PCGS CoinFacts #5254). Submit through an authorized dealer or directly via the PCGS or NGC member submission programs. Never submit a coin that has been cleaned—cleaning permanently damages value.
For a directory of authorized dealers and submission centers, consult the American Numismatic Association (ANA) dealer directory at ana.numismaster.com.
1975 Roosevelt Dime Errors: Frequently Asked Questions
My 1975 dime has no mint mark. Is it the rare one worth $500,000?
Almost certainly not. The Philadelphia Mint produced 585,673,900 dimes in 1975 with no mint mark—this was completely standard before the "P" was added in 1980. To be the valuable No S Proof, your coin must have a genuine mirror Proof surface: the flat fields must be highly reflective (like a small mirror), and Roosevelt's portrait must appear white and frosted against that mirror background. If your coin has a regular satin or lustrous surface, it is a common Philadelphia business strike worth 10 cents.
How can I tell if I have a No S Proof Dime?
Hold the coin under a bright light at a 45-degree angle. If the flat background areas (fields) show a clear, sharp reflection of objects held nearby—like looking into a small mirror—and Roosevelt's portrait appears distinctly white and matte against that mirror field, your coin has Proof surfaces. Then confirm the coin has no mint mark above the date. If both conditions are met, do not clean or handle the coin further; contact PCGS or NGC immediately for authentication.
How many 1975 No S Proof Dimes exist?
Only two authenticated examples are known to exist. Both are certified by PCGS—one graded PR68, the other PR67 CAC. After nearly 50 years of intensive searching by the numismatic community, no third specimen has been confirmed. The coins likely survived because they were sealed in Proof Sets before the Mint discovered the error and pulled the die.
What are the two No S Proof Dimes worth today (2025)?
The most recent public sale established a new record: the "Ohio Sisters" coin (PR67 CAC) sold for $506,250 at GreatCollections in October 2024. The other specimen (PR68) previously sold for $456,000 at Heritage Auctions (2019) and was then resold privately for $516,000. Current market estimates place both coins in the $500,000–$600,000+ range, with a well-established price floor above $450,000.
What are standard 1975-S Proof dimes worth?
A normal 1975-S Proof Roosevelt Dime (with the "S" mint mark present) is a very common coin. The San Francisco Assay Office produced 2,845,450 Proof Sets that year. In top grade (PR69 DCAM), a standard example is worth $10–$20. Impaired examples removed from their sets and spent are worth $1–$5. The exception is the 1975-S RPM-001 (FS-501) repunched mint mark variety, which brings $50–$100 in PR69 DCAM.
Can I find a third No S Proof Dime in an old Proof Set?
Theoretically yes, but the probability is extraordinarily low. The numismatic community has intensively searched 1975 Proof Sets for nearly 50 years with only two confirmed finds. Mint inspectors almost certainly caught and melted the vast majority before sets shipped. However, the Ohio Sisters coin proved that undiscovered specimens can exist in private collections for decades. If you have an original, unopened 1975 Proof Set, examining it carefully costs nothing.
What tools do I need to check my 1975 dime?
For most checks: a bright directional light (desk lamp or phone flashlight) and your eyes. For the RPM-001 variety: a 10x loupe (magnifying glass). For the missing clad layer: a digital scale accurate to 0.01 grams. For the broadstrike: digital calipers to measure diameter. You do not need expensive equipment to perform the primary No S Proof check—the mirror surface is visible to the naked eye in proper lighting.
Why do online videos claim common 1975 dimes are worth $500,000?
Social media content routinely omits the critical "Proof surface" requirement, showing only a coin with a missing mint mark and implying it is the rarity. This misleads millions of viewers—and floods marketplaces like eBay with common Philadelphia dimes listed for thousands of dollars that virtually never sell. The only 1975 dimes worth $500,000 are the two PCGS-certified No S Proofs. No other 1975 dime approaches that value.
Methodology & Sources
Values and diagnostics in this guide are drawn from the following primary sources. All external links point to specific, verified pages rather than generic homepages.
- PCGS CoinFacts #5254 — 1975 10C No S Proof Roosevelt Dime: Population, auction records, diagnostics.
- PCGS Top 100 Modern Coins — 1975 No S Proof Dime: Series context and historical significance.
- PCGS CoinFacts #395128 — 1975-S RPM-001 FS-501: RPM variety diagnostics and value.
- PCGS CoinFacts #5147 — 1975-P Business Strike: Mintage, grade distribution, auction history.
- PCGS CoinFacts #85148 — 1975-D MS67 FB: Denver Full Bands auction records.
- GreatCollections — 1975 No S Proof Dime $506,250 Sale (2024): Ohio Sisters provenance and realized price.
- GreatCollections — 1975 Off-Center NGC AU-58 Listing: Off-center error documentation.
- Variety Vista — 1975-S RPM Listings: Die variety catalog and die markers.
- CoinWeek — 1975 No S Roosevelt Dime Collector's Guide: Background and market context.
- PCGS — How To Tell If Your 1975 Dime Is Valuable: Official PCGS consumer education on the No S Proof.
Values reflect 2025 market estimates based on documented auction records. Actual realized prices vary by grade, eye appeal, certification, and current market conditions.
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.
