Designer: obverse: Arnold Machin; reverse: Stuart Devlin
Reference: KM# 68
Diameter: 31.5 mm
Reverse Central composition featuring two kangaroos holding the Australian Coat of Arms, set against a background of ribbon ornamentation. The numeral 50 is below the coat of arms.
Obverse Central left-facing profile of Queen Elizabeth II of the United Kingdom. Inscription along the left rim: 'ELIZABETH II'. Inscription along the right rim: 'AUSTRALIA 1975'.