The rare marking on error 50p that makes it worth 100 times its face value – is one in your change?

A SMALL error on a particular 50p coin has seen its value sky-rocket - and you could have one in your change.

This coin is selling for more than 100 times its face value because of printing mistake that left it with unique markings.

The Isaac Newton 50p is a rare coin that has got collectors outbidding each other on eBay.

A rare coin guru, who goes by the name coincollectingwizard on TikTok, said: "The Isaac Newton coin is one of the most popular 50ps in circulation."

This coin appears to have several extra lines across the portrait of Queen Elizabeth.

The collector added: "If your coin has these lines then congratulations, you have found it.

"Although we don't know for sure how many of these error coins are in circulation, they are thought to be extremely rare."

The elusive item has been listed on the secondary market for many times more than the face value.

It is thought that the markings on the coins were caused by an error during the striking process.

This is the step where blank coins are engraved with the designed images.

In a manufacturing problem known as "die clash" the front and back dies of a coin press together without a blank coin in between.

This leads to printing errors on the coin.

The extra grooves on this rare 50p are not grooves that have scratched into the coin but are lines that stand proud of the coin face.

Hopefully this means the unique pocket change will be easier to spot.

Other rare coins include the Olympics 2011 Aquatic 50p which can sell for thousands of pounds.

With only around 600 in circulation if you spot one with lines covering the swimmers face you could be in for some extra cash.

If you manage to get hold of the Gruffalo's Child 50p, keep an eye on the creatures pawprint.

The coin with a misprint on the paws can sell for up to £42.99 on eBay despite being first available for £12.99

Make sure to check the back of the sofa for the famed 2009 Kew Gardens 50p.

This one has been a collectors dream for years and sells for up to £142 a pop.

CHECK IF YOU HAVE A RARE COIN

Rare coins and valuable notes can be worth far more than their face value - sometimes thousands of pounds.

But sometimes it's just small differences that make them so lucrative.