This 1961 Austrian pair commemorates aviation progress and postal flight history. The red 4 schilling stamp depicts an Austrian Airlines turboprop aircraft in flight, symbolizing modern air transport (designed by A. Chmielowski). The blue 5 schilling stamp, issued for LUPSTA Wien 1961 (the Vienna Air Post Exhibition), features Austria’s first postal aircraft, a delicate biplane from the pioneering era of aviation, designed by H. Ranzoni Jr. Together, the stamps celebrate Austria’s legacy from the earliest mail flights to contemporary air travel.