This commemorative coin marks the date of Queen Elizabeth II becoming the longest-reigning monarch in British history.
Over the course of the 1,000 year history of the British monarchy, nobody has served as head of state longer than QEII's 63 years and 217 days. Elizabeth II's great-great-grandmother, Queen Victoria, reigned for 63 years and 216 days.
To mark the auspicious occasion, the British Royal Mint is creating a special commemorative coin. The coin will feature five different portraits of the Queen. Since the Queen's portrait is stamped on each piece of British currency, the portraits will actually be a collection of all the different versions of her image that have appeared on British currency throughout her record-breaking reign. The commemorative coin will be worth £20, which is $30.35 in U.S. dollars.