Here is a new and exciting major mint error to come from the Royal Mint in London, England.
A Royal Mint spokesperson said:
"The Royal Mint can confirm that a small number of new design 20 pence coins have been incorrectly struck using the obverse from the previous design, resulted in these coins having no date.
"The issue has now been resolved and the Royal Mint would like to reassure members of the public that these coins are legal tender.
"Prior to the new reverse designs which were launched in April 2008, the date appeared on the reverse side of the 20p. As the date on the new designs has been moved to the obverse side, minting the coin with the new reverse but previous obverse has meant no date appears on the coin."