1998 Dime Errors: Value Guide & Rare Varieties
What is your 1998 dime worth? Missing clad layers sell for $40–$100+, wrong planchets up to $4,602. Full error value guide with weight tests, auction records, and authentication tips.
Most 1998 Roosevelt Dimes are worth face value (10¢), but specific mint errors command $40 to over $4,600.
- 💰 Missing Clad Layer: $40–$100+ certified — the #1 find for this date
- 💰 Major Off-Center Strike (with 1998 date visible): $30–$75
- 💰 Wrong Planchet / Major Error: $200–$4,602 (Heritage Auctions 2012 record)
- 💰 Mated Pair / Die Cap: $500–$2,500+
⚠️ Coins that look copper-colored from acid damage are worth nothing extra. The single most important test: weigh your coin. Under 2.05 grams = possible genuine error worth investigating.
1998 Roosevelt Dime Errors Error Checker
Check your coin for valuable errors and varieties
Values shown are typical retail estimates as of TODO.
Error coin values vary significantly based on grade, eye appeal, severity, and current market demand.
Professional authentication (PCGS, NGC, or ANACS) is strongly recommended for any suspected error coin.
Machine doubling (flat, shelf-like) is NOT a valuable doubled die variety and carries no numismatic premium.
Environmental damage and acid-treated coins are NOT mint errors and have no premium above face value.
The 1998 date falls in the single-squeeze hubbing era, making true Doubled Die varieties extremely rare for this year.
The $4,602 Heritage Auctions record for a 1998-D dime represents a unique major error specimen, not a standard business strike value.
Silver Proof dimes (90% silver) normally weigh approximately 2.50g — do not confuse this with a wrong planchet error.
The United States Mint struck over 2.33 billion 1998 Roosevelt Dimes at the Philadelphia and Denver facilities — making the ordinary coin worth exactly one dime. But buried among those billions are metallurgical defects and press failures that collectors pay serious money to own. This guide walks you through every documented error for this date, how to spot a genuine example with a gram scale and loupe, and exactly what each type is worth. See the full 1998 Roosevelt Dime value guide (all grades, all mints) →
1998 Roosevelt Dime Specifications & Mintage
Every error diagnosis starts with knowing what normal looks like. The standard 1998 dime is a copper-nickel clad coin — think of it as a metal sandwich with a pure copper core between two nickel-copper outer layers. Any deviation from the specs below is worth a second look.
| Specification | Standard Value |
|---|---|
| Diameter | 17.90 mm |
| Thickness | 1.35 mm (approx.) |
| Weight | 2.27 grams (±0.09g tolerance) |
| Edge | Reeded (118 reeds) |
| Outer Layer Composition | 75% Copper, 25% Nickel |
| Inner Core Composition | 100% Pure Copper |
| Overall Metal Ratio | 91.67% Copper, 8.33% Nickel |
| Magnetic? | No — standard US clad dimes do not respond to a magnet |
1998 Mintage by Facility
| Facility | Mint Mark | Type | Mintage |
|---|---|---|---|
| Denver | D | Business Strike | 1,172,250,000 |
| Philadelphia | P | Business Strike | 1,163,000,000 |
| San Francisco | S | Proof — Clad | 2,086,507 |
| San Francisco | S | Proof — Silver (90% Ag) | Included in Silver Sets |
1998-S Proof Dimes: San Francisco produced Proofs in two compositions — standard clad and 90% silver. Silver Proofs weigh approximately 2.50g, noticeably heavier than the 2.27g clad standard. A circulated (impaired) clad Proof is worth $1–$3; an uncirculated clad Proof brings $2–$8. Silver Proofs carry a higher premium due to metal content. Important note: The 2.50g silver Proof weight is intentional — do not mistake it for a wrong planchet error.
💡 Essential Tool for 1998 Error Hunting
A digital gram scale accurate to 0.01g is the single most important instrument for authenticating 1998 dime errors. A standard 10x jeweler's loupe helps with surface examination. A caliper confirms diameter for broadstrikes.
View complete 1998 Roosevelt Dime values for all grades and mint marks →
1998 Roosevelt Dime Quick Checks
1998 Roosevelt Dime Quick Checks
Work through these checks in order. The first two require a gram scale — buy one before you start. Checks marked TRAP are false alarms that catch many beginners.
A digital scale reading 1.89g — well under the 2.27g standard, signaling a genuine Missing Clad Layer.
Check 1 — Missing Clad Layer
Both faces of the coin. One side will be the standard silver color; the opposite side is a distinct copper or reddish color. Also examine the edge for an exposed copper-only cross-section.
One face clearly copper-colored with sharp, fully detailed strike. Coin weighs 1.80g–2.05g on a precision scale — significantly below the standard 2.27g. Edge shows a clean separation where the clad layer is absent.
Acid-treated or environmentally damaged coins can appear copper-toned but weigh near-normal (2.15g–2.27g), have pitted or bubbly surfaces, and show mushy details. Genuine missing clad coins have crisp, sharp design details because the die struck the bare copper surface after the layer detached.
Check 2 — Wrong Planchet Error
Overall coin appearance, weight, and metal composition. A wrong planchet will look or feel noticeably different from a standard clad dime. Weigh the coin precisely and test for magnetism.
Significantly wrong weight — e.g., approximately 2.50g for a 90% silver planchet, or entirely wrong metal. Standard US clad dimes are non-magnetic; a magnetic response is suspicious. Full dime design struck on incorrect metal. Foreign planchet examples may require XRF testing for definitive identification.
A missing clad layer (one face copper, light weight) is a different error category. Discolored coins from environmental exposure are not wrong planchets — the actual core metal must be different from standard clad.
Check 3 — Off-Center Strike (Date Must Be Visible)
Overall coin shape and design placement. The design will be visibly shifted to one side, leaving a blank crescent of unstruck metal. The 25%–50% range with the full 1998 date still visible is the collector sweet spot.
Design noticeably shifted 10%–60% off-center with the date 1998 clearly visible. Metal flow lines visible at the struck/unstruck boundary. Blank crescent is smooth and uniform.
Post-mint bending or squeezing can mimic off-center appearance. Genuine off-center strikes show a smooth blank crescent — not cut marks, shear lines, or bezel damage. Dateless off-center dimes are generic and worth only $5–$10.
Check 4 — Mated Pair or Bonded Die Cap
Two coins that interlock or fit together like puzzle pieces (mated pair), or a single coin that is dramatically cupped, mushroom-shaped, or thimble-like (bonded die cap). These are catastrophic press failures.
Two coins struck simultaneously — one bears the incuse mirror image (brockage) of the other and they fit together precisely. Die caps show progressive cupping and distortion from being stuck to the hammer die. Extremely rare for 1998.
Coins squeezed together in a vise post-mint show flat compression marks, not die-struck impressions with proper relief. Genuine mated pairs must fit together with precision and show proper metal flow.
Check 5 — Improper Annealing (Black Beauty)
Overall coin surface color. The coin will appear uniformly dark — gunmetal blue, black, or deeply toned copper across the entire surface. Caused by overheating in the annealing furnace before striking.
Dark or gunmetal discoloration across the full coin. Critical test: the coin must weigh the standard 2.27g. The edge will NOT show a sharp clad layer separation — the layers are all present, just the surface is discolored from heat.
Missing clad layer (weighs under 2.05g with visible edge separation). Environmental toning (uneven, patchy coloring). Artificially toned coins. Coins exposed to fire post-mint show different, more chaotic damage patterns.
Broadstrike (left) showing expanded diameter and smooth, reeding-free edge versus a normal 1998 dime (right).
Check 6 — Broadstrike (Entry-Level Error)
The edge and overall diameter. A broadstrike occurs when the collar (the steel ring that forms the reeded edge) fails to deploy. Metal spreads outward, making the coin wider than 17.9mm.
Diameter exceeds 17.9mm (use calipers). Edge is completely smooth with zero reeding. Rim is flat or absent. Full design visible but spread across a wider disk.
A coin with any visible reeding is NOT a broadstrike, even if it looks wide. Filed or ground edges show tool marks. Dryer coins (tumbled in a clothes dryer) lose reeding but also show overall surface damage.
TRAP — Acid / Environmental Damage (Looks Copper, Worth Nothing)
Any coin that appears copper-colored or heavily discolored — especially coins found buried or exposed to corrosive chemicals.
Weigh it. Acid-treated coins weigh near-normal (2.15g–2.27g). Genuine missing clad layer coins weigh 1.80g–2.05g. Also: acid damage produces pitted, bubbly, or dissolved surfaces with blurry design details. Genuine missing clad coins have sharp, crisp details.
Acid dissolves the nickel from the surface, exposing the copper below — but it also attacks the copper core and destroys detail. This is post-mint damage with zero numismatic value.
TRAP — Machine Doubling or Die Deterioration (Not a Valuable Doubled Die)
Date, lettering, and device edges. Any apparent doubling on the coin.
The 1998 date falls in the single-squeeze hubbing era. This manufacturing change (implemented around 1997–1998) eliminated the mechanism that created dramatic doubled dies like the famous 1955 Lincoln Cent. Virtually all doubling seen on 1998 dimes is flat, shelf-like machine doubling or die deterioration (mushy lettering from a worn die).
True doubled dies show rounded secondary images with depth and clear separation. Machine doubling is flat and shelf-like with no depth. Die deterioration produces overall mushiness, not a secondary image.
1998 Roosevelt Dime Error Values at a Glance
All verified error types for the 1998 Roosevelt Dime. Rows with amber highlighting link to full diagnostic guides in the Jackpots section below. "Raw" means unslabbed; "Certified" means professionally graded by PCGS, NGC, or ANACS.
| Error Type | Category | Frequency | Diagnostic Key | Value (Raw) | Value (Certified) |
|---|---|---|---|---|---|
| Missing Clad Layer | Planchet | Scarce | Weight <2.05g; copper face; sharp details | $15–$30 | $40–$100+ |
| Wrong Planchet | Planchet | Ex. Rare | Wrong metal / weight; XRF confirmation | — | $200–$4,600+ |
| Improper Annealing | Planchet | Rare | Gunmetal blue/black; full 2.27g weight | $5–$15 | $30–$60 |
| Broadstrike | Striking | Common | Smooth edge; diameter >17.9mm | $3–$8 | $15–$30 |
| Off-Center (Minor) | Striking | Common | 5%–15% off-center | $3–$10 | $20–$35 |
| Off-Center (Major, with Date) | Striking | Scarce | 20%–60% off-center; 1998 date visible | $15–$40 | $50–$100+ |
| Mated Pair / Die Cap | Striking | Ex. Rare | Two interlocking coins or mushroom shape | — | $500–$2,500+ |
| Partial Collar | Striking | Uncommon | "Railroad rim" — split reeded/plain edge | $2–$5 | $15–$25 |
| Doubled Die (DDO/DDR) | Die | Very Rare | Minor Class VIII thickening only; no clear split | Face–$2 | $10–$20 |
| Die Clash | Die | Uncommon | Ghost image of opposing die on coin surface | $1–$5 | $10–$20 |
ℹ️ Why No Major Doubled Dies in 1998?
Around 1997–1998, the US Mint transitioned to "single-squeeze" hubbing — forming the entire die impression in one high-pressure cycle. This eliminated the mechanism that created dramatic doubled dies (which required multiple misaligned impressions). Any doubling on 1998 dimes is minor, localized thickening (Class VIII) with negligible premium, not the separated, rounded images of a classic doubled die variety.
1998 Roosevelt Dime: Valuable Error Varieties
Detailed diagnostics for each verified valuable error. Use the gram scale weight tests listed here before spending money on authentication.
1998 Missing Clad Layer
Normal 1998 dime (left) versus Missing Clad Layer dime (right) showing exposed copper face.
Origin & Background
The 1998 dime's clad composition is manufactured like a metal sandwich — a pure copper core bonded between two copper-nickel outer layers. This bonding is done under immense pressure to create the coinage strip from which individual planchets are punched. If the bonding surfaces are contaminated (by oxides, dirt, or gas bubbles), the adhesion fails. The outer layer peels away before the strike, and the die impresses the design directly onto the exposed copper core. This is the root cause of the Missing Clad Layer error, and it is the most liquid and accessible high-value error for this date.
How to Identify
- One face is distinctly copper or reddish in color; the other is standard silver.
- The struck design on the copper face is sharp and fully formed — not mushy or pitted. This is critical: the coin was struck after the layer detached, so dies left a full impression.
- Weigh the coin on a precision digital scale. Genuine missing clad layer: 1.80g–2.05g. The outer layers account for approximately 15–20% of the coin's total mass.
- The coin edge will show a visible cross-section of exposed pure copper without the outer nickel layer.
Edge cross-section of a Missing Clad Layer dime showing exposed copper core where the outer layer is absent.
False Positives to Avoid
Acid-treated coins are the #1 false positive. Acid dissolves the nickel layer, exposing copper below — but the coin still weighs near-normal (2.15g–2.27g) and the surface will be pitted, bubbly, or dissolved with blurry design details. A genuine missing clad coin has crisp strike details and significant weight loss. If the surface is rough and the weight is normal, it is acid damage — value: face value only.
Market Values
- Circulated (brown copper): $10–$20
- AU / Low Mint State (red-brown): $25–$45
- Gem Mint State with blazing red copper: $60–$125+
- Raw (unslabbed) typical: $15–$30
Auction Record
$40.00 for AU58 ANACS — 1998-P Obverse Missing Clad Layer (PCGS Auction Price Archive). High-grade Gem examples with Red designation can significantly exceed this floor.
1998 Wrong Planchet Error
Weight comparison illustrating the difference between a standard 2.27g clad dime and a heavier wrong-planchet example.
Origin & Background
A Wrong Planchet error occurs when a planchet intended for a different denomination or a foreign coin is accidentally fed into the dime press and struck with dime dies. Philadelphia has historically struck coins for foreign governments; if a similarly sized foreign planchet remains in the tote bins and enters the 1998 dime press, the result is a wrong planchet error. A dime struck on a 90% silver planchet (as used for San Francisco Proof dimes) would weigh approximately 2.50g — significantly heavier than the standard 2.27g. The famous $4,602 auction record for a 1998-D dime graded MS62 at Heritage Auctions (January 3, 2012) is widely interpreted as representing a major error of this type. A standard 1998-D in MS62 trades for well under $20 — the four-figure price can only be explained by a significant error on the coin.
How to Identify
- Weigh the coin precisely. Standard clad = 2.27g. A silver planchet = approximately 2.50g. Foreign planchet weights vary by country.
- Test with a magnet — standard US clad dimes are non-magnetic. Any magnetic response is a major flag.
- The coin may appear abnormal in color, size, or metallic sheen.
- Foreign planchet confirmation typically requires XRF (X-Ray Fluorescence) testing to determine exact metal composition.
False Positives to Avoid
A Missing Clad Layer is NOT a wrong planchet — the base metal is correct clad, just missing a bonded layer. Discolored coins from environmental exposure have the correct clad composition. The actual core metal must differ from standard clad to qualify as a wrong planchet. Also, the heavier weight of a 1998-S silver Proof dime (~2.50g) is intentional and expected — do not confuse a silver Proof with a wrong planchet error.
Market Values
- Foreign planchet (XRF confirmed): $200+
- Major error specimens (certified): $500–$4,600+
Auction Record
$4,602 for MS62 — 1998-D Roosevelt Dime, Heritage Auctions, January 3, 2012 (PCGS Auction Price Archive, 1998-D). This record price for an MS62 coin (normally worth under $20) indicates a major error specimen.
⚠️ Important Context on the $4,602 Record
Do not look at this number and assume pocket change is worth thousands. The $4,602 record represents a unique major error coin — likely a wrong planchet or similarly catastrophic failure — that was catalogued under the standard 1998-D dime designation. Finding one requires a coin with provably anomalous weight, metal composition, or striking characteristics, confirmed by a professional grading service.
1998 Major Off-Center Strike (With Date)
1998 dime approximately 40% off-center with the 1998 date clearly visible in the struck portion.
Origin & Background
An off-center strike occurs when the planchet feed mechanism malfunctions, delivering the planchet only partially into the striking chamber. The dies strike the planchet on its edge rather than its face, leaving one portion fully struck and the other a blank crescent of unstruck metal. Severity is measured by percentage: a coin showing only half its design is 50% off-center. At high-speed Schuler press rates (up to 750 coins per minute), minor feed misalignments can escape quality control.
How to Identify
- Design is visibly shifted, leaving a blank crescent of unstruck planchet on one side.
- The date 1998 must be legible for maximum value. Dateless off-center dimes are generic and worth only $5–$10.
- The 25%–50% off-center range with full date is the collector sweet spot.
- Look for smooth metal flow lines at the struck/unstruck boundary — these are characteristic of genuine press strikes.
- The blank crescent area should be smooth and uniform, not cut or filed.
Off-Center Severity & Value
| Off-Center % | Date Visible | Est. Value |
|---|---|---|
| 1%–5% | Full date | $1–$3 |
| 10%–20% | Full date | $10–$20 |
| 25%–50% | Full date ★ Sweet Spot | $30–$75 |
| 25%–50% | No date | $5–$10 |
| 75%+ | No date | $2–$5 |
False Positives to Avoid
Post-mint bent or squeezed coins can look off-center. Genuine strikes show a smooth blank crescent with natural metal flow lines — not cut marks, shear lines, or bezel damage from jewelry or machine setting.
Auction Record
No single verified auction record on file for 1998 off-center dimes. Market prices reflect active eBay and dealer sales in the ranges above, with certified examples at PCGS and NGC commanding premiums at the high end of the range.
1998 Mated Pair / Bonded Die Cap
A bonded die cap dime showing progressive mushroom-shaped cupping from repeated strikes while stuck to the hammer die.
Origin & Background
A Mated Pair occurs when two planchets enter the striking chamber simultaneously or in rapid succession without ejection. The first coin (the Cap) wraps around the die; the second (the Brockage) is struck by the cap instead of the die, receiving an incuse mirror image of the design. A Bonded Die Cap results when a coin sticks to the hammer die and is never ejected — with each subsequent strike, the cap becomes more distorted, ultimately assuming a thimble or mushroom shape. These represent catastrophic failures of the press's ejection mechanism. For 1998, an ANACS MS64 "Mushroom Double Struck Indent Double Date" example has been documented in collector communities.
How to Identify
- Mated Pair: Two coins that interlock with precision — one cupped, the other bearing the incuse mirror image (brockage). They must fit together like puzzle pieces.
- Bonded Die Cap: A single coin that is dramatically cupped, mushroom-shaped, or thimble-like. Shows progressive metal distortion consistent with repeated strikes.
- Brockage coin shows an incuse mirror image of the design — the raised elements of the design are recessed, and vice versa.
- Metal flow is uniform and consistent with die-applied pressure, not random hammer damage.
False Positives to Avoid
Coins squeezed together in a vise or intentionally deformed post-mint show flat compression marks, not die-struck impressions with proper relief. Genuine mated pairs must fit together with precision and show die-quality struck detail on both faces. A bonded die cap shows uniform progressive distortion, not random impact damage.
Market Values
- Mated pair (two coins): $500–$1,500+
- Bonded cap or multi-strike mushroom: $1,000–$2,500+
- Values depend heavily on number of coins involved, visual severity, and certification.
Auction Record
No single verified final sale price on record for 1998 mated pair or die cap dimes. Values estimated from comparable catastrophic striking errors for the Roosevelt Dime series.
1998 Improper Annealing — "Black Beauty"
An improperly annealed "Black Beauty" dime showing the characteristic uniform gunmetal-blue/black surface discoloration.
Origin & Background
Before planchets are struck, they are heated in an annealing furnace to soften the metal and improve strikability. If a planchet is overheated, copper molecules from the core migrate through the nickel layer to the surface, or copper dust present in the furnace sinters (fuses) onto the planchet's surface. The result is a coin with a distinctive dark appearance — gunmetal blue, black, or deeply toned copper — across the entire surface. These are nicknamed "Black Beauties" in the collector community.
How to Identify
- Uniform dark surface discoloration — gunmetal blue, charcoal, or deep copper black.
- Critical weight test: The coin weighs the standard 2.27g. All three clad layers are present; only the surface is discolored. This distinguishes it from a missing clad layer.
- The edge will show normal clad layering — no sharp separation or missing layer visible on the edge cross-section.
- Discoloration should be relatively uniform across the coin surface, not patchy or isolated to one area.
False Positives to Avoid
Missing clad layer (weighs under 2.05g; one face clearly copper with visible edge separation). Environmental toning is uneven and patchy, not uniform. Artificially toned coins show chemicals or surface treatments under magnification. Coins exposed to fire or extreme heat post-mint show more chaotic and irregular damage patterns.
Market Values & Auction Record
Raw improperly annealed examples: $5–$15. Certified examples: $30–$60. No specific auction record on file for 1998. Eye appeal and the vibrancy of the dark discoloration affect price.
1998 Dime Traps: Common Mistakes That Cost Collectors
These are the errors that are NOT errors. Each one fools beginners — and even some experienced collectors — into thinking they have a valuable coin. Value: face value or less in every case.
Genuine Missing Clad Layer (left) with crisp detail versus acid-damaged coin (right) showing pitted, dissolved surface.
⚠️ Trap 1 — Acid / Environmental Damage
One or both faces of the coin appear copper-colored or reddish. The coin looks like it could be a Missing Clad Layer error. Often found in circulation or dug from the ground.
Hydrochloric or sulfuric acid dissolves the nickel from the coin's surface, exposing the copper below. Burial in soil, exposure to fertilizers, or contact with household cleaning chemicals causes the same effect. This is post-mint damage — it happened after the coin left the Mint.
- Weighs near-normal: 2.15g–2.27g (acid damage does not remove mass like a missing layer does)
- Surface is pitted, bubbly, or has dissolved design details — genuine missing clad coins have sharp, crisp details
- Discoloration is patchy or irregular, not a clean single-face copper presentation
- May smell of chemicals or have a sticky, gummy surface residue
Value: Face value only. No numismatic premium whatsoever.
⚠️ Trap 2 — Machine Doubling & Die Deterioration
A second, slightly offset image on the date, lettering, or portrait under magnification. Looks like a doubled die coin.
Machine doubling (also called strike doubling) occurs when the die bounces slightly at impact, leaving a flat, shelf-like second image. Die deterioration produces mushy lettering from worn, over-used dies. Both are extremely common in high-volume production years like 1998. Critically, 1998 is in the single-squeeze hubbing era — the manufacturing change that eliminated true doubled dies. No recognized major doubled die variety exists for the 1998 Roosevelt Dime.
- Machine doubling appears flat and shelf-like with no depth; genuine doubled dies show rounded secondary images with clear separation and depth
- Die deterioration produces overall mushiness — no crisp secondary image
- True doubled dies on 1998 dimes would show only minor, localized thickening (Class VIII) and carry very minimal premium ($10–$20 certified)
Value: Face value. Machine doubling and die deterioration carry no numismatic premium.
Machine doubling (left) showing flat, shelf-like secondary image versus a genuine doubled die (right) with rounded separated image.
⚠️ Trap 3 — The "Close AM" Confusion
A collector applies Lincoln Cent variety-hunting diagnostics to a 1998 dime, examining the spacing between letters on the reverse.
The FS-901 "Close AM" (or "Wide AM") variety is a Lincoln Cent diagnostic that applies specifically to 1998 and 1999 pennies — not dimes. The letter spacing on the 1998 Roosevelt Dime reverse is static for this year. No "Wide AM" or "Close AM" variety has been recognized for the 1998 Roosevelt Dime. Applying penny diagnostics to dimes wastes time.
- Focus your 1998 dime examination on weight (scale test for planchet errors) and physical integrity (broadstrike, off-center, mated pair)
- Die variety hunting for 1998 dimes produces near-zero returns given the single-squeeze hubbing era
Value: Face value. No Close AM or Wide AM variety exists for the 1998 Roosevelt Dime.
1998 Roosevelt Dime: How Grade Affects Error Value
1998 Roosevelt Dime: How Grade Affects Error Value
Grade (condition) has a significant multiplier effect on 1998 dime error values. The Sheldon scale runs from Poor (P-1) to Perfect Mint State (MS-70). For error coins, key grades to understand are:
- Circulated (G through AU): The coin shows wear on the high points — Roosevelt's hair detail or the torch flame. Circulated Missing Clad Layer examples (copper face, brown tone) start around $10–$20.
- About Uncirculated (AU-50 to AU-58): Slight rub on the highest points but most luster intact. The verified 1998-P Obverse Missing Clad Layer ANACS auction sale of $40 was in AU58.
- Mint State (MS-60 to MS-66+): No wear. For Missing Clad Layers, the copper face color is paramount. "Red" (RD) copper — bright and blazing — commands the highest premium. "Red-Brown" (RB) and "Brown" (BN) designations reduce value significantly.
For off-center strikes, grade matters less than the percentage off-center and date visibility. A 40% off-center in Fine condition with a fully visible date outperforms a 5% off-center Gem Uncirculated. For wrong planchets and mated pairs, originality and visual drama drive value more than strict grade.
1998 Roosevelt Dime: When to Get Professionally Certified
1998 Roosevelt Dime: When to Get Professionally Certified
Professional Third-Party Grading (TPG) by PCGS, NGC, or ANACS is strongly recommended for any 1998 dime error with an estimated value above $50. Certification provides three things: authentication (confirming it is a genuine mint error and not damage), grading (establishing the grade), and a tamper-evident slab that makes the coin liquid in the secondary market.
When to Submit
- Always submit: Wrong planchet errors, mated pairs, and bonded die caps. These require professional authentication — no dealer will pay top dollar for an unslabbed example.
- Strongly recommended: Missing Clad Layer examples in Mint State or with red copper color. Certification confirms the error is genuine (not acid damage) and establishes the color designation.
- Optional: Broadstrikes and minor off-center strikes with values under $30. Grading fees may exceed the coin's value at this tier.
- 1998-S Business Strike: The San Francisco Mint produced only Proof dimes in 1998. A coin with an S mint mark claiming to be a business strike needs immediate professional verification — the mint mark may be altered or added post-mint.
⚠️ Do Not Clean Your Error Coin
Never clean, polish, or dip a suspected error coin. Cleaning destroys luster and originality, dramatically reducing value. Handle by the edges only. Store in a non-PVC flip or airtight holder.
Dealer information and submission links are coming soon. For now, consult PCGS, NGC, or ANACS directly for current submission fees and turnaround options.
1998 Roosevelt Dime Errors: Frequently Asked Questions
Is my 1998 dime worth anything?
A standard 1998 dime in circulated condition is worth face value — 10 cents. In uncirculated condition it carries a modest premium of $0.25–$5.00. The real value potential lies in specific mint errors: Missing Clad Layer ($40–$100+), major off-center strikes with the date ($30–$75), and extremely rare wrong planchets or mated pairs ($200–$4,600+). Start with a gram scale — weigh your coin. If it's under 2.05g, investigate further.
How do I check if my 1998 dime is missing a clad layer?
Two steps: (1) Look — one face should be clearly copper-colored with sharp, fully formed design details. (2) Weigh — place the coin on a digital scale accurate to 0.01g. Standard 1998 dime = 2.27g. A genuine missing clad layer will weigh 1.80g–2.05g. If the coin looks copper-toned but weighs 2.15g–2.27g, it has likely been acid-damaged and is worth face value only.
Why did a 1998-D dime sell for $4,602 at Heritage Auctions?
A standard 1998-D dime in MS62 is worth under $20. The $4,602 Heritage Auctions sale (January 3, 2012) almost certainly represents a major error coin — most likely a wrong planchet or similarly catastrophic failure — that was catalogued under the standard 1998-D designation. Auction databases sometimes record major errors under the base date/mint SKU without specifying the error type. This does not mean your pocket 1998-D dime is worth thousands.
My 1998 dime looks doubled. Is it a valuable doubled die?
Almost certainly not. In 1997–1998, the US Mint transitioned to single-squeeze hubbing, which eliminated the mechanism that created dramatic doubled dies like the 1955 Lincoln Cent. Any doubling on a 1998 dime is virtually always flat, shelf-like machine doubling (caused by die bounce at impact) or die deterioration (mushy lettering from a worn die). Neither type carries numismatic premium. Even true doubled dies for 1998 would show only minor, localized thickening worth $10–$20 certified at most.
What tools do I need to check my 1998 dime?
The three key tools are: (1) A digital gram scale accurate to 0.01g — essential for detecting planchet errors (anything under 2.05g warrants investigation). (2) A 10x jeweler's loupe — for examining surface details and distinguishing genuine errors from damage. (3) A digital caliper — for measuring diameter (broadstrikes exceed 17.90mm). A strong magnet can also quickly screen for wrong planchet errors, since standard US clad dimes should not respond to magnets.
Is there a valuable "Close AM" 1998 dime?
No. The "Close AM" and "Wide AM" varieties (FS-901) apply exclusively to 1998 and 1999 Lincoln Cents — not Roosevelt Dimes. The letter spacing on the 1998 dime reverse is static and no such variety has been recognized. Do not spend time examining dimes for penny diagnostics.
What is a partial collar error and what is it worth?
A partial collar error (also called a "railroad rim") occurs when the collar only partially surrounds the planchet during striking. The result is a coin with one portion of the edge showing normal reeding and the other portion plain and slightly expanded — resembling a train wheel's flange profile. For 1998 dimes, raw examples are worth approximately $2–$5; certified examples bring $15–$25. They are relatively uncommon but not rare enough to command major premiums.
How much is the 1998-S silver proof dime worth?
The 1998-S silver Proof dime (90% silver) carries a premium over the standard clad Proof due to its silver content. It weighs approximately 2.50g — heavier than the 2.27g clad dime. Standard clad 1998-S Proofs in original packaging are worth $2–$8; an impaired (worn) example drops to $1–$3. The silver version commands a higher premium. Note: the 2.50g weight of a silver Proof is intentional and should NOT be confused with a wrong planchet error.
Sources & Methodology
Values, specifications, and auction records in this guide were drawn from the following primary sources:
- PCGS CoinFacts — 1998-P Roosevelt Dime
- PCGS CoinFacts — 1998-D Roosevelt Dime
- PCGS Auction Prices — 1998-D MS series (source of $4,602 record)
- PCGS Auction Price Archive — 1998-P AU58 ANACS Missing Clad Layer ($40 record)
- PCGS Educational Article — Missing Clad Layer Mint Error Coins
- NGC Coin Explorer — 1998-D Roosevelt Dime MS
- Numismatic News — Dime Series Doubled Dies Ignored (single-squeeze hubbing transition)
All values reflect estimated retail market ranges at time of research. Error coin values fluctuate based on grade, eye appeal, and current market demand. Professional authentication is recommended for any coin with an estimated value above $50.
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.
