Rare £2 coins that were minted with an error could now be worth £500.
The 2014 First World War Centenary coins were produced with the denomination of "two pounds" missing from the design. Experts Coin Hunter say that only two like this have been identified which is why they could reach high prices at auction.
The organisation's Facebook page says: "Around 5,720,000 coins were struck for circulation - it is likely that the wrong heads die was left in place when production switched from 2014 Trinity House to this coin, creating a number of coins with no denomination. Check your coins that feature Lord Kitchener - if the heads side does not show “TWO POUNDS” - you have an error that appears to be very rare."
Read more: Royal Mint says which coins are officially the rarest
The first coin discovered so far was sold at auction in March for £500, and the other was discovered and shared by Coin Hunter.
Every year the Royal Mint posts the mintage figures, providing the only official guide to the rarest coins in circulation.
Generally speaking, the rarer a coin is the more valuable it is and the more a collector will pay for it - with the value also depending on condition.
According to ChangeChecker a rare 50p could be worth as much as £900.
In 2019 over 500 million coins were released into circulation, including three new 50 pence designs celebrating Arthur Conon Doyle’s iconic Sherlock Holmes, and Paddington the Bear at St Paul’s Cathedral and the Tower of London.
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