1 oz $100 AUD Australian Platinum Koala Coin BU (Backdated) Year: Random Grade: Brilliant Uncirculated Country: Australia Denomination: $100 AUD Manufacturer: Perth Mint Metal Content: 1 troy oz Purity: .9995 Fine Platinum Diameter: 32.1 mm Thickness: 2.7 mm The Platinum Koala is the most famous series of Platinum coins from the Perth Mint in Australia and considered the world's favorite Platinum bullion products. Each year, the Australian Platinum Koala featured a unique design making this series even more exciting and more collectible. Random year coins are a great purchase because you never know what unique design you will receive! We reserve the right to cancel any orders (including second offers) not paid within 24h of auction ending. Follow tracking of purchased items to avoid returns. We don't combine orders.