Queen Elizabeth II was born on 21 April 1926 and ascended the throne in 1952 at the age of 25, following the death of her father, King George VI. She married Prince Philip, Duke of Edinburgh, in 1947, and together they had four children. Her reign spanned 70 years, making her the longest-serving monarch in British history.

In 2026, the world commemorates what would have been her 100th birthday—celebrating a life of service, dignity and devotion to her country and the Commonwealth.

The coin’s reverse includes five effigies of Queen Elizabeth II, each featured on coins produced by The Perth Mint, representing distinct periods of her historic reign. At the centre is the most recent effigy of Queen Elizabeth II designed by Jody Clark (2019), elegantly framed in an ornate design. Surrounding it are four earlier effigies: Ian Rank-Broadley (1998) at the top left, Raphael Maklouf (1985) at the bottom left, Arnold Machin (1966) at the bottom right, and Mary Gillick (1953) at the top right.

Together, these portraits reflect the evolving image of the monarch across seven decades of her reign. The background features Australia’s national floral emblem, the golden wattle, symbolising the nation’s connection to the Commonwealth. Arranged clockwise from the top, are the Sovereign’s Imperial State Crown, Orb, Tudor Rose, and Sceptre—each signifying key elements of royal tradition and authority.