CHICAGO (CNN) - It's flawed and more than a century old, but this coin could sell for as much as $5 million.
It's a 1913 Liberty Head nickel, one of only five known of its kind.
Experts suspect a mint worker made these nickels illegally in 1912.
The coin was discovered in a car wreck that killed its owner in 1962 and mistakenly declared to be a fake.
The coin goes to auction in April in Chicago.