Australia | 50 Dollars, 2008 | Obverse: Portrait of David Unaipon (born David Ngunaitponi) (1872-1967), was a well-known Indigenous Australian of the Ngarrindjeri people, a preacher, inventor and writer. Unaipon's contribution to Australian society helped to break many Indigenous Australian stereotypes | Reverse: Portrait of Edith Dircksey Cowan (1861-1932), was an Australian politician, social campaigner and the first woman elected to an Australian parliament | Window: Southern Cross, Denomination |