Its a serious error according to roYal mint error coins article... This coin was produced as the lettering was cut into the die twice leaving a doubled image of the letters on the obverse.
This was caused by a software bug during the production of the die. A few of these resultant doubled die coins escaped quality control at the Royal Mint. Great coin for the error coin collectors. Coin will be securely packed and sent via signed for. The item "Error Coin £2 Two Pound Coin VERY RARE Double Die 2010 Letters(IRRBB)coin Hunt" is in sale since Thursday, September 10, 2020.This item is in the category "Coins\Coins\British\Decimal Coinage (c. The seller is "coincrush" and is located in Ilford. This item can be shipped worldwide.