The new 12-sided pound coin, the shape of which resembles the old three-penny bit, entered circulation in March and boasts new high-tech security features The old round pound is on the way out ...

The coin in question was among the first of the new type of 12-sided £1 coins created by the ... 1 coin introduced in March 2017 to replace the old round pound. But did you know some of these ...

The 12 sided £1 coin replaced the old round design in 2017(Getty) Check Your Change clarifies that the coins with this mark were sold as part of a pair set from the Royal Mint in 2016.