The Australian two ounces silver piece (abbreviated as 2 oz and designated with Ag for "silver") is a bullion and commemorative 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 gilded 2oz silver proof coin marks 125 years since the foundation of the Perth Mint.
The mint says about it:
The Perth Mint opened on 20 June 1899 at the height of the Western Australian gold rush. Refining the gold and striking 106 million sovereigns over the next three decades, it went on to produce vast quantities of Australian circulating coinage between 1940 and 1984. With an outstanding reputation for quality, craftsmanship, and efficiency, The Perth Mint returned to its original purpose as a maker of fine gold coins in 1986. Today, it is renowned for the design and production of exclusive Australian collector and investor pieces.
Reflecting its best-known contemporary coin series, the piece portrays a kangaroo, kookaburra, and koala artistically arranged among a representation of golden wattle, Australia’s national floral emblem. As well as the coin’s edge and rims, each animal is gilded in 24-carat gold. | 
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