Third crowned portrait of HM Queen Elizabeth II facing right, wearing the George IV State Diadem.

The George IV State Diadem, officially the Diamond Diadem, is a type of crown that was made in 1820 for King George IV. The diadem is worn by queens and queens consort in procession to coronations and State Openings of Parliament. The piece of jewellery has been featured in paintings and on stamps and currency. It can be seen in the Queen's Gallery at Buckingham Palace.

ELIZABETH II DEI GRATIA REGINA FIDEI DEFENSATRIX means Elizabeth II, by the grace of God, Queen and Defender of the Faith.

From 1985 to 1991 the head of Queen Elizabeth II was a slightly smaller size. From 1993 to 1997 the head was a slightly larger size. The change over was made part way through 1992 so there are two versions in this year. 1997 has small varieties in design of the portrait.

Engraver: Raphael David Maklouf

An English oak encircled by the Diamond Diadem, representing England.

In England, the English oak has assumed the status of a national emblem. This has its origins in the oak tree at Boscobel House, where the future King Charles II hid from his Parliamentarian pursuers in 1650 during the English Civil War; the tree has since been known as the Royal Oak. This event was celebrated nationally on 29 May as Oak Apple Day, which is continued to this day in some communities. ‘The Royal Oak’ is one of the most popular pub name in Britain and has been the name of eight major Royal Navy warships. The naval associations are strengthened by the fact that oak was the main construction material for sailing warships. The Royal Navy was often described as ‘The Wooden Walls of Old England’ (a paraphrase of the Delphic Oracle) and the Navy’s official quick march is "Heart of Oak". Furthermore, the oak is the most common woodland tree in England.

Engraver: Leslie Durbin

The coin’s edge inscription is in Latin ‘DECUS ET TUTAMEN’ which may be translated as an ‘ornament to safeguard’. This inscription refers to itself, as it is decorative and protects the coin from being easily counterfeited.