Air Mail
Austria, cancelled post card with stamp
1987. 77. BALLONPOSTFLUG.
Austria, Michel 1129, Cover
1963. 29. BALLONPOST.
Austria, cancelled postal stationay
1984. 72. BALLONPOST.
Austria, Michel 1084, Cover
1961. 25. BALLONPOST. SALZBURG 11. MAI 1961.
Austria, cancelled post card with stamp
1988. 80. BALLONPOST.
Austria, cancelled post card with stamp
1985. 30. SONDER-BALLONPOSTFLUG.
Austria, cancelled post card with stamp
1981. 66. BALLONPOST.
Austria, Cover
1980. 22. SONDER-BALLONPOST. 1. BALLON FLIGHT ON BARBUDA.
Austria, Michel 1580, cancelled post card with stamp
1978. 60. BALLONPOST.
Austria, Michel 1247, cancelled post card with stamp
1967. 38. BALLONPOST.
Austria, Michel 1657, Cover
1981. 23. SONDERBALLONFLUG.
Austria, Cover
1992. 87. BALLONPOST.
Austria, Michel 1825, Cover
1985. 74. BALLONPOST.
Austria, Michel 1934, cancelled post card with stamp
1988. BALLONPOST WERBESHAU.
Austria, cancelled post card with stamp
1982. 67. BALLONPOST.
Austria, cancelled post card with stamp
1991. 86. BALLONPOST.
Austria, Michel 1508, Cover
1976. 55. BALLONPOST.
Austria, Michel 965, cancelled postal stationay
1951. 7. BALLONPOST. SALZBURG BALLON ZÜRICH 21.X.1951.
Austria, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.
Austria, Michel 1530+, cancelled post card with stamp
1976. 56. BALLONPOST.
Austria, Michel 1695, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.