Comparing an erroneous coin side-by-side to a standard one, he flipped them over to reveal the Queen Elizabeth II bust and pointed out a "die clash error", which appear like scratches. Indeed ...

A rare £2 coin with a barely noticeable defect is selling ... that means no 'Two Pounds' on the obverse. This is called a mule error, which happens when the wrong dye is used during minting.

they showed the difference between a standard coin and one with the error, highlighting scratch-like marks near Queen Elizabeth II's portrait, known as a "die clash error". Upon closer inspection ...

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