The Australian two ounces gold piece (abbreviated as 2 oz and designated with Au for "gold") is a bullion coin format. Uniquely, in Australia there are two mints authorised to strike legal tender: the Royal Australian Mint (which also makes the country's circulating coinage) and the Perth Mint which only makes collector and bullion coins, as well as other bullion products.
Both mints endeavour to create coins with attractive designs, and to introduce new designs and themes often, in order to raise the numismatic value of the coins over the value of previous metal used.
This 2oz gold proof high relief coin is part of the 30th Anniversary of the Australian Kookaburra coin range by the Perth Mint.
The Mint says about it:
First issued by The Perth Mint in 1990, the Australian Kookaburra is an iconic Australian coin series. Each year, the series portrays a new artistic impression of the kookaburra, a bird with an unmistakable laughing call that’s synonymous with Australia - from the outback to the back yard. This 2020 release marks the Kookaburra’s 30th anniversary. Struck from 2oz of 99.99% pure gold in high relief, it has an extremely limited mintage of just 125.
This year’s Australian Kookaburra design portrays a kookaburra perched on a corrugated iron rooftop. The background depicts a stylised impression of sunrise, which along with sunset, is a time of day when kookaburras typically like to call. Celebrating the 30th anniversary of the Australian Kookaburra series, the coin has a special obverse featuring a representation of Stuart Devlin’s design for the original 1990 issue. His much-loved artistry, which portrays a kookaburra sitting on a tree branch amid gum leaves, appears below a miniature version of Jody Clark’s effigy of Her Majesty Queen Elizabeth II. | 
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