ELIZABETH D G REG F D 50 POUNDS around the effigy of Elizabeth II facing right wearing a crown. Below the neck the initials of the engraver
Description reverse
BRITANNIA 1/40 oz FINE GOLD 999.9 2017 around a map of Great Britain, that is forming the body of Britannia. In the north the head of Britannia, in the east and west shield and trident. On the edge of the left field trident and initials of the engraver
Reference
United Kingdom. 50 Pounds (Gold) 2017, The Royal Mint. CoCo GB-2017-0002.