The one troy ounce Platinum Britannia coin has been minted by The Royal Mint since 1987. It became an instant classic. The coin is struck with a full troy ounce of 99.99% fine platinum; the standard for platinum bullion coins. The obverse features Queen Elizabeth II, and the reverse depicts the legendary figure of Britannia. A radial sunburst design behind Britannia adds anti-counterfeiting protection.