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 ...

The 20p piece is a rare “mule” coin dating ... 18 rarest coins minted under Queen Elizabeth II The 'extra-special' rare 50p coin sold for £4,000 and how to spot it After attracting 46 bids ...

A TINY mistake on your usual 20p coin could make it a whopping 350 times more valuable. You will need to look out for one small detail if you want to mint some extra cash. Coins become more ...

Rare coins can be worth hundreds of times more than their face value, as one person found out when they sold a 20p coin for more than £230 on eBay. We are all being urged to check our wallets for rare ...

A rare 20p coin could fetch more than 250 times its face value to someone lucky enough to find one. Back in 2008 a minting error meant for the first time in centuries ...

Rare coins could be worth hundreds of times more than their face value, as one person found out when they sold a 20p coin for more than £230 ...

Rare coins can be worth hundreds of times more than their face value, as one person found out when they sold a 20p coin for more than £230 on eBay. We are all being urged to check our wallets for ...