Australian Antarctic Territory

The early expeditions to the Australian Antarctic Territory have used stamps of different countries. Mawson in 1911 used stamps of Tasmania, Shackleton in 1921-1922 used stamps of Great Britain and Mawson in 1929-1931 used stamps of Australia. Post offices have been opened from 1954, the first at Mawson Station. Currently post offices are operated at all three Australian stations. Stamps  inscribed ‘Australian Antarctic Territory’ have been issued since 1957. These stamps are valid for use in Australia, often first released there and a few months later in the Australian Antarctic Territory and on nearby Macquarie Island. The stamps issued all have themes related to life in the Arctic. [source: StampWorldHistory, also see: Wikipedia]