The coins have been dubbed the 'holy grail' of change collecting and if you find one it could be worth a lot more than 20p ...
An unusual coin could net its owner over 250 times its face value after an error when it was made. The rare 20p coin was one of an unknown number released by the Royal Mint without a date.
COIN collectors have been urged to check their wallets as one ultra-rare 50p coin is set to be sold for more than £4,000. The item features famous fictional detective Sherlock Holmes on one side ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results