Australia is one of the large issuers of bullion coins. Uniquely, there are two independent mints in the country 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. Their issues are normally in standard sizes (mostly based on the troy ounce), but sometimes they also issue coins in non-standard formats, such as this one
This coin is part of the Australian Wedge-tailed Eagle series by the Perth Mint, and the fifth design by John M. Mercanti (the series features a new design every year).
The Mint says about it:
"This stunning bi-metal coin comprises 3/4oz of pure gold and 3/4oz of pure platinum.
The Wedge-tailed Eagle series portrays intimate studies of Australia’s largest bird of prey. Each carefully considered design from the former Chief Engraver of the United States Mint, John M. Mercanti, reveals more about the life and habits of this powerful, majestic bird that can be seen across the continent in coastal, desert and alpine habitats. Swooping Eagle Design The coin’s design presents a close encounter with a magnificent wedge-tailed eagle as it swoops on outstretched wings with talons ready to snatch its prey." | 
Search for Australia: Gold and Platinum 2020 Australian Wedge-tailed Eagle on eBay 
