Introduction: The Fascinating World of Error Coins
Error coins are accidental treasures—mistakes made during the minting process that escaped detection. These rare flukes have become some of the most valuable coins in numismatics, with certain dime errors selling for six figures. In this guide, we’ll explore the most sought-after Roosevelt dime errors, their fascinating backstories, and what makes them so valuable.
Top 4 Most Valuable Roosevelt Dime Errors
1. The 1975-S No-Mint Mark Roosevelt Dime: A $456,000 Rarity
- Grade: PF68 (Proof)
- Auction Record: $456,000
- Why It’s Special:
This proof dime was struck at the San Francisco Mint but mysteriously lacks the “S” mint mark. Only 2-3 specimens are confirmed to exist, making it one of the rarest modern U.S. coins. One sold for nearly half a million dollars in a private sale.
2. The 1983-S No Mint Mark Proof Dime: Perfection Worth $10,560
- Grade: PF70 (Perfect Proof)
- Recent Sale: $10,560
- The Error:
Like the 1975-S, this proof dime missed getting its “S” mint mark. In pristine PF70 condition, it represents one of the finest known examples of this error.
3. The 1970-S No-Mint Mark Proof Dime: $1,610 Mystery
- Grade: PF69 (Proof)
- Market Value: $1,610+
- Collector’s Note:
While more common than the 1975-S, these error dimes are still highly prized. Many were likely discovered and spent before collectors realized their significance.
4. The 1967 Roosevelt Dime with Rim Clip: Affordable Error
- Error Type: 10% Rim Clip
- Value Range: 60−60−300
- What Happened:
The coin blank was improperly fed into the press, resulting in a distinctive clipped edge. Larger clips command higher premiums.
Understanding Dime Errors: A Collector’s Primer
Why Are Error Coins So Valuable?
- Extreme Scarcity: The U.S. Mint’s quality control catches 99.9% of errors
- Historical Significance: Errors tell the story of minting processes
- Investment Potential: Rare errors consistently appreciate in value
Most Common (and Valuable) Types of Dime Errors:
- Missing Mint Marks: Like our 1975-S superstar
- Off-Center Strikes: Misaligned impressions (5% or more off-center)
- Double Dies: Duplicate design elements from misaligned dies
- Clipped Planchets: Curved or straight clips from incomplete blanks
- Brockage: Mirror-image impressions from stuck coins
How to Hunt for Valuable Error Dimes
Where to Find Error Coins:
- Coin Rolls from Banks: Search circulated coins
- Estate Sales: Often overlooked collections
- Online Auctions: eBay, Heritage Auctions, etc.
- Coin Shows: Dealers sometimes miss errors
What to Look For:
- Check All Proof Dimes for missing mint marks
- Examine Edges for clips or irregularities
- Use a 5x Magnifier to spot doubling or strikes
- Weigh Your Coins: Errors often have slightly different weights
Grading Matters:
- A PF70 error coin can be worth 100x more than the same error in lower grades
- Consider professional grading (PCGS/NGC) for valuable finds
Frequently Asked Questions
Q: How can I tell if my dime is an error?
A: Compare it to normal examples, check for missing details, and consult error coin guides.
Q: Are all error dimes valuable?
A: No—only dramatic, identifiable errors with clear minting mistakes hold significant value.
Q: Where’s the best place to sell an error dime?
A: For high-value errors, use Heritage Auctions or Stack’s Bowers. For mid-range errors, try eBay or coin forums.
Q: What’s the most ever paid for a dime error?
A: The 1975-S No-S proof dime holds the record at $456,000 in a private sale.
Conclusion: Start Your Error Coin Journey Today
While finding a six-figure dime error is incredibly rare, many collectors have discovered 100−100−10,000 errors in their pocket change or old collections. With sharp eyes and basic knowledge, you could uncover the next great numismatic treasure.
Want to learn more? Check out our guide to [Most Valuable Penny Errors] or [How to Grade Coins Like a Pro].
