1 Dollar - Elizabeth II 4th Portrait - Centenary of Powered Flight

Australia's centenary of powered flight commemorative marks a hundred years from Josephoel Hammond's 1910 demonstration flights — among the earliest controlled powered flights on Australian soil — rather than the Wright Brothers' 1903 Kitty Hawk achievement. The Royal Australian Mint has issued commemorative dollars in this aluminium bronze format since the switch from silver in the 1980s, and pieces like this rarely see pocket change.