Designer: obverse: Arnold Machin; reverse: Stuart Devlin
Reference: KM# 64
Diameter: 19.4 mm
Reverse In the central part of the reverse is a relief, front-facing Australian echidna; the numeral 5 is placed in the background of the animal. Below the image are the designer's initials, Stuart Devlin - 'SD'.
Obverse In the central part is the right-facing profile of Queen Elizabeth II of Great Britain wearing a crown. Along the rim are inscriptions in English: on the left, the monarch's name - 'ELIZABETH II'; on the right, the name of the dominion 'AUSTRALIA' and the year of minting '1977'.