Stefan Proynov Fantastic Washington Quarter mint errorStefan Proynov: Fantastic Washington Quarter mint error
Check out this fantastic NGC-certified Washington Quarter that was Doub As you can see, the second strike was off-center and caused the loss of the last 2 digits of the obverse date.

Stefan Proynov: This coin was named Fantastic by NGC – there’s a reason.
Stefan Projnov – mint error exspert European commented on this coin: Such double struck coins are very difficult to detect because they are placed under strict control at the mint.

To come across such a coin is extremely rare, which is why they are so expensive and are offered for thousands of dollars.

Source: Mint Error News