ELIZABETH II D G REG FID DEF 100 POUNDS around the effigy of Elizabeth II facing right with a crown. On the lower end of the shoulder the initials of the engraver
Description reverse
ONE OUNCE FINE GOLD BRITANNIA around Britannia facing right wearing a corinthian helmet. Her long hair flutters in the wind. Below the date between two olive-branches
Reference
United Kingdom. 100 Pounds (Gold) 2010, The Royal Mint. CoCo GB-2010-0014.