A "die error" coin means the coin is effectively a misprint, and though it made it into circulation it's a rare find and could be worth more. advertisement. Money Digest.

The collector, knowing coins with imperfections sell for substantially more than face value, has listed the item on eBay for a staggering £25,086.72.. They are also asking for an additional £8. ...

The coin of interest is a 2016 £1 coin, which is the newer 12-sided style. Although these 12-sided coins were officially launched in March 2017, over 500 million were produced by the Royal Mint ...