Air transport
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.
Andorra, Michel 178, Cover
1962. Erster Zucker-Raketenstart in Andorra ZR 122 ANDORRA 122. ZUCKER-RAKET (Pyrenäen 1962.
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.
Austria, Michel 1134, cancelled post card with stamp
1963. 30. BALLONPOST.
Austria, Michel 1801, cancelled post card with stamp
1985. 30. SONDER-BALLONPOSTFLUG.
Austria, Michel 1602, Cover
1979. 19. SONDERBALLONFLUG.
Austria, Cover
1978. 18. SONDER-BALLONPOST. PRAHA 72.
Austria, Michel 1893, Cover
1988. 36. SONDER-BALLONPOSTFLUG.
Netherlands, Michel 646, Cover
1959. RAKET VLUCHT. 6 C. GEVLOGEN MET POSTRAKET SKUA 5-9-59. Dobbelprint nederlandse ruimtevaart igj agi igm.
Austria, Michel 873, cancelled postal stationay
1955. 13. BALLONPOST. WIEN BALLON ZÜRICH 10.4.1955.
Austria, Michel 1105, Cover
1962. 27. BALLONPOST. KUFSTEIN 27. V 1962.
Austria, Cover
1990. 84. BALLONPOST.
Austria, Michel 1557, cancelled post card with stamp
1977. 58. BALLONPOST.
Austria, Cover
1983. 69. BALLONPOST.
Austria, Cover
1983. 70. BALLONPOST.