What's a "Mule" Coin? (And No, It's Not From the Animal)
Forget hybrids in nature—the most exciting hybrids are in your pocket. A "mule" coin is a numismatic oddity where the front (obverse) of one coin is accidentally married to the back (reverse) of another. Think of it as a minting factory's weirdest blind date.
The name comes from the mule, the hybrid offspring of a horse and a donkey, because the coin has "parents" of two different designs. These happen when mismatched dies—the metal stamps that imprint a coin's design—are paired together by mistake at the mint.
The Ultimate Mule Story: The $155,250 Quarter-Dollar The king of all modern U.S. mules is the legendary 2000 Sacagawea Dollar-Washington Quarter mule. In a crazy mix-up, a cracked Sacagawea dollar die was replaced with a Washington state quarter die, creating a coin with a quarter's front and a dollar's back on a golden dollar planchet. The mint caught it fast, destroyed most, but a few escaped. Only about 19 are known to exist. One sold in 2012 for $155,250. Talk about a happy accident!
Mules are the unicorns of coin collecting—incredibly rare and highly prized. Finding one in circulation is the ultimate dream. While you're hunting, scan everything with Coin ID Scanner. You never know when two wrong dies might make a right... and incredibly valuable... coin.