Air Mail
Austria, Michel 870, Cover
1956. 15. BALLONPOST. JUNGFERNFAHRT DES ÖSTERR FREIBALLON OMO 29.4.56. + WIEN WIENER INTERNATIONALE FRÜNJAHRSMESSE 1956 MESSEPALAST 16. III. 56.
Austria, cancelled post card with stamp
1987. 77. BALLONPOSTFLUG.
Austria, Cover
1984. 72. BALLONPOST.
Austria, cancelled post card with stamp
1980. 63. BALLONPOST.
Austria, Michel 1184, Cover
1965. 7. SONDER-BALLONPOSTFLUG.
Austria, Cover
1986. 34. SONDER-BALLONPOSTFLUG.
Austria, Michel 895 + 897, Cover
1956. 15. BALLONPOST. JUNGFERNFAHRT DES ÖSTERR FREIBALLON OMO 29.4.56. + Besuchen Sie das heeresgeschitliche Museum Wien 21.3.58.
Austria, Michel 1047, cancelled post card with stamp
1963. 30. BALLONPOST.
Austria, Michel 870, Cover
1955. 14. BALLONPOST ERSTMALS IM FREIEN ÖSTERREICH SALZBURG 29.10.1954. + WIEN 101 3. BUNDESKONGRESS WIEN 18.-22.10. 1955 18.10.1955.
Austria, cancelled post card with stamp
1988. 80. BALLONPOST.
Austria, Michel 1802, Cover
1985. 73. BALLONPOST.
Austria, Cover
1989. 81. BALLONPOST.
Austria, Michel 1715, cancelled post card with stamp
1982. 68. BALLONPOST.
Austria, Michel 912, cancelled post card with stamp
1955. 13. BALLONPOST. WIEN BALLON ZÜRICH 10.4.1955.
Austria, Michel 1576, Cover
1978. 30 jahre BALLONPOST.
Austria, cancelled post card with stamp
1992. 87. BALLONPOST.
Austria, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.
Austria, cancelled post card with stamp
1987. 78. BALLONPOSTFLUG.
Austria, Cover
1987. 77. BALLONPOSTFLUG.
Austria, cancelled post card with stamp
1979. 62. BALLONPOST.
Austria, Michel 1174, cancelled post card with stamp
1964. 32. BALLONPOST.