In 2017 to celebrate Farewell to the Last Round Pound and the introduction of the new 12 Sided Nations of the Crown £1 One Pound Coin entering circulation in March, the Royal Mint released a very special Limited Issue Farewell Last Round Pound and Nations of the Crown Mint Mark £1 One Pound 2 Coin Set Sealed.
The set includes the Last Round Pound £1 One Pound Coin and the 12 Sided Nations of the Crown £1 One Pound Coin which features an exclusive Mint Mark not available on the standard version both dated 2016.