Fourth 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.

Engraver: Ian Rank-Broadley

Depicts a koala, wombat, lorikeet and the initials JS. The denomination 50 is on the body of the wombat.

The koala is an arboreal herbivorous marsupial native to Australia. Its closest living relatives are the wombats. It is easily recognisable by its stout, tailless body and large head with round, fluffy ears and large, spoon-shaped nose. Pelage colour ranges from silver grey to chocolate brown.

Wombats are short-legged, muscular quadrupedal marsupials that are native to Australia. They are about 1 m (40 in) in length with small, stubby tails.

Lories and lorikeets (tribe Loriini) are small to medium-sized arboreal parrots characterized by their specialized brush-tipped tongues for feeding on nectar of various blossoms and soft fruits, preferably berries. They are widely distributed throughout the Australasian region and the majority have very brightly coloured plumage.