2009 1oz Fine Silver Proof Coin, Discover Australia, Dreaming Series-Echidna. This 1oz Fine Silver Coin was struck by The Perth Mint and created by Darryl Bellotti, the Perth Mint's in-house Australian Indigenous artist. The coin's reverse design represents an echidna, an Australian egg-laying mammal covered in sharp spines. With a coloured pattern in the background, the coin's reverse also incorporates The Perth Mint's 'P' mint mark. Certificate of Authenticity included with this set numbered 4239. Mintage 10,000.