First introduced in 2007, the Perth Mint’s Silver Koala coin features the iconic Australian animal – Koala. With the mintage of 1 oz coins capped at just 300,000 coins, the 1 oz Australian Silver Koala, made with .999 pure silver, is one of the most desirable coins for anyone looking to add a rare and iconic piece to their collection. The reverse side features the image of Queen Elizabeth II, who has depicted on Australian coins since 1952.