A single 2001-D Lincoln cent error recently sold for $114,000, with another example bringing $66,000 at auction. Known as the 2001 Mule Penny, this is one of the rarest and most valuable modern U.S. coin errors ever discovered. At PennyVerse.info, we break down exactly what makes this coin special—and how you can check your own change to see if you have one.
What Is the 2001-D Mule Penny?
A mule coin is created when the U.S. Mint accidentally strikes a coin using mismatched dies—dies intended for two completely different coins.
The 2001-D Mule Penny features:
- Obverse (Heads): Standard 2001-D Lincoln cent design
- Reverse (Tails): Roosevelt dime reverse (torch, oak branch, and olive branch) instead of the Lincoln Memorial
- Weight: ~2.5 grams (normal zinc penny composition)
- Edge: Smooth like a penny—not reeded like a dime
Why It’s So Valuable
- Extremely Rare: Only two confirmed examples exist
- Historic Mint Error: The U.S. Mint has never reported producing such an error intentionally
- High Demand: Error collectors, investors, and museums are eager to acquire it
Recent Sales Records:
| Grade | Sale Price |
|---|---|
| MS-66 | $114,000 |
| AU-55 | $66,000 |
How to Identify a 2001-D Mule Penny
1. Check the Date & Mint Mark
Must be 2001-D (Denver Mint). Philadelphia and San Francisco issues are not known for this error.
2. Inspect the Reverse
Look for the Roosevelt dime design instead of the Lincoln Memorial.
3. Weigh the Coin
- Correct Weight: ~2.5 grams (zinc cent planchet)
- Fake Giveaway: If it weighs closer to a dime (~2.27 grams) or has reeded edges, it’s not authentic.
Tools for Verification
- Magnifying Glass or Loupe (10x recommended)
- Digital Scale (accurate to 0.01g)
- Reference Images (compare to known certified examples)
Avoiding Fakes
Since this coin went viral, scammers have tried to profit with:
❌ Glued dime reverses on pennies (check for seams/adhesive)
❌ Modified reverses using tools (look for unnatural marks)
❌ “Replica” coins passed off as real
Rule #1: Only trust coins certified by PCGS or NGC.
Could More Be Out There?
With over 4.3 billion 2001-D pennies minted, it’s possible more mule errors exist.
Best Hunting Tips:
- Search original 2001-D bank rolls
- Check inherited collections
- Examine every 2001-D penny’s reverse carefully
What to Do If You Find One
- Handle only with cotton gloves (to avoid damaging the surface)
- Take clear, high-resolution photos of both sides
- Submit to PCGS or NGC for authentication
- Sell through Heritage Auctions or another top-tier auction house
Leave a Reply