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The top 10 rarest 50p coins have been revealed by the Royal Mint - some of which could fetch more than 100 times their face value.

As we move to an increasingly cashless society, it's easy to forget about the loose change lost in back pockets or old purses and wallets, but some coins can actually be worth a lot more than their face value.

When it comes to what coins have a higher value, there are a few rules. Generally speaking, the rarer the coin, also known as a low mintage, the higher value the coin might carry.

On top of that, printing errors and coins tied to major historical events can increase their value.

Some rare coins can be sold for as much as hundreds of pounds, with 50p coins being particularly valuable due to their seven-edged design being unique and easy

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