Check your change for rare 50p coin with error worth more than £50

An expert has urged Brits to look out for a valuable 50p coin that could sell for around £50. This piece features a rare error making it worth around "100 times" its face value.

The coin was minted in 2017 in honour of Sir Isaac Newton, with only 1.8 millon created. It proved extremely popular with collectors with the Royal Mint offering a strike your own Isaac Newton 50p experience a year later.

However, you want to look for a specific mistake. In a video uploaded to social media platform TikTok, an expert known as the Coin Collecting Wizard explained: "This 50p could have an error making it valuable."

He detailed the error to look for which includes several extra lines across Queen Elizabeth's face on the obverse (head side) of the coin.

"The Sir Isaac Newton 50p is one of the most popular 50ps in circulation shortly after it was issued in 2017," he continued.

"What you are looking for is for the obverse to have several extra lines across Queen Elizabeth's portrait. If your coin has these lines, then congratulations, you have found it."

According to the expert, this is thought to be an error caused during the striking process, a result of what is known as a die clash.

He said: "Interestingly, the extra lines aren't grooves scratched into the surface of the coin, but rather whiskers standing slightly proud of the surface.

"Although we don't know for sure how many of these error coins are in circulation, they're thought to be extremely rare. They've even been listed on the secondary market for more than 100 times face value.

"Have you ever found an error coin in your change or perhaps you have this one?" His advice is echoed by experts at Change Checker.

They said: "As if this coin's incredible popularity, intricate design and low mintage figure weren't enough to make it extremely collectible, there's something else you should look out for.

"Several collectors have reported finding an error on their 2017 Sir Isaac Newton 50p. The reverse design looks normal, however the obverse appears to have several extra lines across Queen Elizabeth II's portrait."

At the time of reporting, some examples of this coin were listed on eBay with some priced at £100 and another at £1,026.