People have been urged to check their coin collection after the Royal Mint listed the rarest 50p pieces in circulation, with some worth hundreds.
The most valuable of 50p coins is the Kew Gardens edition, worth £650. There are 200 million 50ps circulating in the UK alone. The lower the mintage figure, the less coins that are in circulation, making them rarer and more valuable.
Most of the rare 50ps in question were minted to commemorate a notable occasion in culture, sport or history. The Kew Gardens coin was released in 2009 to mark 250 years since the famous gardens opened in 1759.
