Second crowned portrait of HM Queen Elizabeth II facing right, wearing the Girls of Great Britain and Ireland tiara.

The Girls of Great Britain and Ireland tiara was a wedding present in 1947 from her grandmother, Queen Mary, who received it as a gift from the Girls of Great Britain and Ireland in 1893 on the occasion of her marriage to the Duke of York, later George V. Made by E. Wolfe & Co., it was purchased from Garrard & Co. by a committee organised by Lady Eve Greville. In 1914, Mary adapted the tiara to take 13 diamonds in place of the large oriental pearls surmounting the tiara. At first, Elizabeth wore the tiara without its base and pearls but the base was reattached in 1969. The Girls of Great Britain and Ireland Tiara is one of Elizabeth's most recognisable pieces of jewellery due to its widespread use on British banknotes and coinage.

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

Engraver: Arnold Machin

A detailed and intricate depiction of the Royal Coat of Arms.

The royal coat of arms of the United Kingdom, or the Royal Arms for short, is the official coat of arms of the British monarch. The shield is quartered, depicting in the first and fourth quarters the three passant guardant lions of England; in the second, the rampant lion and double tressure flory-counterflory of Scotland; and in the third, a harp for Ireland. The crest is a statant guardant lion wearing the St Edward's Crown, himself on another representation of that crown. The dexter supporter is a likewise crowned English lion; the sinister, a Scottish unicorn. In the greenery below, a thistle, Tudor rose and shamrock are depicted, representing Scotland, England and Ireland respectively. This armorial achievement comprises the motto of English monarchs, Dieu et mon Droit (God and my Right), which has descended to the present royal family as well as the Garter circlet which surrounds the shield, inscribed with the Order's motto, Honi soit qui mal y pense (Shame on he who thinks evil).

Engraver: Eric Sewell

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.