1 oz $100 AUD Australian Platinum Platypus Coin (Backdated) Year: Random Grade: Brilliant Uncirculated Denomination: $100 Metal Content: 1 troy oz Purity: .9995 Thickness: 2.7 mm Diameter: 32.2 mm This Platinum Platypus is one of two .9995 fine Platinum coins made by the Perth Mint. The coin features a unique platypus who is only found near freshwater rivers and lakes in Australia. Contains 1oz of .9995 fine Platinum. 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.