Proof coins are finished to a higher standard than the coins you find in your change. The Royal Mint is celebrating this remarkable achievement with a range of annual coinage sets, including this collectors proof edition. Already the longest-reigning British monarch, she’ll be the first to mark seven decades as head of state. She acceded on 6 February 1952 and was crowned later that year. In 2022 Her Majesty the Queen will celebrate seventy years on the throne. Annual collectors proof set for 2022, featuring five commemorative pieces and eight definitive designs for the Platinum Jubilee year.