The one dollar coin denomination (written as $1) was introduced in Australia in 1984, replacing the earlier banknotes. The original reverse design by Stuart Devlin on circulating coins has not been changed since its introduction. The denomination is also often used to issue circulating commemorative coins with various reverses.
The denomination is also used by both the Royal Australian Mint and the Perth Mint to issue an extensive range of collector coins which are legal tender in Australia but are not intended for circulation - such as this one. The coin is larger than the normal $1 coins.
This coin is part of the Perth Mint's Bush Babies series of coins featuring the babies of various native animals of Australia, and depicts a baby Bilby.
The greater bilby (Macrotis lagotis), often referred to simply as the bilby since the lesser bilby (Macrotis leucura) became extinct in the 1950s, is an Australian species of nocturnal omnivorous animal in the order Peramelemorphia. Other vernacular names include dalgyte, pinkie, or rabbit-eared bandicoot. Greater bilbies live in arid parts of northwestern and central Australia. Their range and population is in decline.
The coin was issued in a Philatelic Numismatic Cover (PNC). The $0.60 stamp features a delightful baby bilby and is postmarked for the first day of issue, 6th September 2011, in the town of Charleville QLD 4470. In addition, the envelope is endorsed with Australia Post’s Seal of Authenticity and official number. | 
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