Could your ordinary-looking $1 coin be worth a small fortune? 
The 2014-D Sacagawea Dollar Mule is one of the rarest U.S. modern coin errors—and one example sold for a jaw-dropping $84,000 at auction in 2021. Here’s the full story and how to spot one in your own pocket change.
What Exactly Is a “Mule” Coin?
In coin collecting, a mule coin is created when mismatched dies (front and back designs) are accidentally paired together at the Mint. These blunders are extremely rare because of strict quality checks—but when they happen, they can be worth tens of thousands of dollars.
The 2014-D Sacagawea Mule is one of the most exciting examples ever found:
- Obverse (front): Sacagawea carrying her baby
- Reverse (back): A Presidential dollar reverse design instead of the normal eagle or Native-themed design
This mix-up created a true rarity that stunned collectors worldwide.
Auction Details
Coin: 2014-D $1 Sacagawea / Presidential Dollar Mule (Discovery Coin)
Grade: AU58 NGC (About Uncirculated)
Auction House: Heritage Auctions
Date Sold: April 24, 2021
Final Price: $84,000
How to Spot the Mule Error
Think you might have one? Here’s what to check:
Step 1: Flip over your 2014-D Sacagawea Dollar.
Step 2: If the reverse has the Presidential Dollar design (instead of the eagle/Native design), you may have a mule!
Step 3: Look for the “D” mint mark (Denver Mint, 2014).
Pro Tip: The lettering and layout of the Presidential dollar reverse look completely different from the standard Sacagawea design, so it’s easy to notice.
Value Estimate
Only one example has been confirmed and sold, but experts believe others may exist. If more are discovered, possible values include:
- $80,000 – slightly worn condition
- $100,000+ – mint state condition
Beware of Counterfeits
Because of its high value, counterfeit versions may appear. If you think you’ve found one:
Do NOT clean the coin
Submit it to PCGS or NGC for authentication
Work with trusted dealers or auction houses like Heritage Auctions or Stack’s Bowers
