Rare and most valuable 20p coins that could be worth up to £750

FINDING a rare coin in your change could be a way of making some quick cash - especially if it's a rare bronze 20p. The error coin could be worth up to £750 - but it's not just that 20p coin that could be worth a small fortune.

Unlike 50p and 10p coins, the 20p design has remained almost the same since it was first minted back in 1982, making only a handful of them actually valuable to a collector. Zero 20p coins were minted in 2017 or 2018 - with the Royal Mint focused on introducing the new twelve-sided £1 piece. The Treasury said no more were needed after thousands of older 20ps coins re-entered circulation when Brits found them in change jars at home in their search for old round £1 coins. But more than 125 million were minted in 2019 and a further 32.75 million in 2020. The 20p coins that are worth the most are "mule" ones which have been minted with inaccuracies on them by mistake. It's not just 20p coins issued by the Royal Mint that are popular either, with ones made in the Channel Islands and Gibraltar also turning big profits online.

Rare error coins often sell for a lot of money on eBay too - these will have some noticeable fault that happened in the minting process, but their flaws often mean they rocket in value. Always be cautious of fakes though, as they'll often show up online. And just because a coin says it sold for that much, doesn't mean it actually did. Often collectors are willing to pay well above the market rate for a piece which completes their collection - so don't take advertised sums as gospel. You can check your rare piece is real by looking at how many people have been willing to bid for it in the past - and how much they've driven the price up by too. Experts like  or  will check if your change is legitimate and worth what others are saying too. We've put together a round-up of the most valuable ones - so keep your eyes peeled. Here's what to look out for:

Bronze 20p coin - £750

One mistake turned the normally silver 20p coin bronze, after being struck onto a 1p blank that had slipped into the wrong batch. These are super rare and aren't specific to any year, although one from 1987 did crop up which coin site ChangeChecker ended up giving away as a prize. Coin enthusiast Colin Bellamy, who runs Coin Hunter, has valued these coins at £750 each. We've had a look online to see how much these error - or "mule" - coins sell for but it doesn't look like there are any currently available on sale. They truly are a rare find which could make them worth even more.

Blank 20p coin - £430