Air transport
Austria, Michel 1706, cancelled post card with stamp
1982. 67. BALLONPOST.
Austria, cancelled postal stationay
1986. 75. BALLONPOSTFLUG.
Austria, Michel 1909, Cover
1988. 79. BALLONPOST.
Austria, cancelled post card with stamp
1991. 86. BALLONPOST.
Austria, Michel 1185, Cover
1965. 7. SONDER-BALLONPOSTFLUG.
Austria, Michel 1685, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.
Brazil, Cover
1936. servico aereo transocen brasil - europa condor zeppelin 20. fev. 1936. to France.
Austria, cancelled post card with stamp
1987. 77. BALLONPOSTFLUG.
Belgium, Michel 732, cancelled post card with stamp
1946. NEDERLANDSCHE RUIMTEVAART STUDIO Poste lance par fusee en Belgique. Raketprovoflugo.__ OOSTENDE 15-3-46. Mars-Venus-Raket - Anno 1960?
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.
Iceland, Michel 147-149, Hinged
1931. Air Mail. Zeppelin. Set of 3
Scott C9-C11
Afa 147-149
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.