As it is so unusual it has meant the coin has been dubbed the "holy grail" of change collecting making it much sought after. The 20p coin was highlighted on Instagram by Coin Collecting Wizard.

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 ...

Brits have been urged to check their change for a seemingly ordinary coin that could be worth 300 times its face value. According to an expert a number of 20p pieces could fetch up to £60 each ...