Air Mail
Austria, Michel 1822, cancelled post card with stamp
1985. 74. BALLONPOST.
Austria, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.
Austria, Michel 1525+, Cover
1976. 56. BALLONPOST.
Austria, cancelled postal stationay
1983. 69. BALLONPOST.
Austria, Michel 1528-1529, cancelled post card with stamp
1976. 56. BALLONPOST.
Austria, cancelled post card with stamp
1989. 81. BALLONPOST.
Austria, Michel 895, Cover
1956. 15. BALLONPOST. JUNGFERNFAHRT DES ÖSTERR FREIBALLON OMO 29.4.56. + Besuchen Sie das heeresgeschitliche Museum Wien 21.3.58.
Austria, Michel 1146, Cover
1964. 31. BALLONPOST.
Austria, Michel 1659, cancelled post card with stamp
1980. 64. BALLONPOST.
Austria, Michel 1085, Cover
1961. 5. BALLONPOSTSONDERFLUG.
Austria, Cover
1985. 73. BALLONPOST.
Austria, Michel 1601, Cover
1979. 19. SONDERBALLONFLUG.
Austria, Michel 1918, Cover
1988. 36. SONDER-BALLONPOSTFLUG.
Austria, cancelled postal stationay
1955. 13. BALLONPOST. WIEN BALLON ZÜRICH 10.4.1955.
Austria, cancelled post card with stamp
1990. 83. BALLONPOST.
Austria, Michel 1554, Cover
1977. 58. BALLONPOST.
Austria, Michel 1732, Cover
1983. 69. BALLONPOST.
Austria, cancelled post card with stamp
1989. 39. SONDER-BALLONPOST. 1. BALLONPOST IN LITAUEN.
Austria, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.
Austria, Michel 1175, Cover
1964. 32. BALLONPOST.
Austria, Cover
1985. 32. SONDER-BALLONPOSTFLUG.