The sovereign was a real circulating gold coin of the United Kingdom, with a nominal value of one pound sterling, until outbreak of the First World War in 1914. Most countries in the world around the same time reduced or stopped production of gold coins for circulation.
The production of gold sovereigns, as bullion coins, restarted in 1957, however, there have since been a number of breaks in production.
Current sovereigns are produced in the same 22 carat Crown gold (91.66% gold and 8.34% copper) alloy as the first modern sovereigns of 1817. Today’s Alloys have made coins harder and more durable, so they can resist scratches and dents during handling.