Designer: obverse: Arnold Machin; reverse: Stuart Devlin
Reference: KM# 68
Diameter: 31.5 mm
Reverse The Australian coat of arms, featuring a kangaroo and an emu supporting a shield, is depicted against a background of feathers. Above the shield is a torse surmounted by the Commonwealth Star. Below the coat of arms is the numeral 50, beneath which are the designer's initials 'SD' for Stuart Devlin.
Obverse In the center is a right-facing profile portrait of Queen Elizabeth II of the United Kingdom, wearing a crown. To the left, following the curve of the coin's edge, is the monarch's name 'ELIZABETH II'. To the right are the country name 'AUSTRALIA' and the year of issue '1984'.