Air transport
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.
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?
Germany, Michel 539 + 533, Cover
1939. 3 RM Graf Zeppelin + 25 Pf. Luftpost HAMBURG 8.2.39. to Arica, Chile.
Austria, Michel 1175, Cover
1964. 32. BALLONPOST.
Austria, Cover
1985. 32. SONDER-BALLONPOSTFLUG.
Austria, cancelled post card with stamp
1989. 82. BALLONPOST.
Austria, cancelled post card with stamp
1978. 1. ÖSTERR. BALLONPOST-AUSSTELLUNG SALZBURG.
Austria, cancelled post card with stamp
1980. 64. BALLONPOST.
Austria, Cover
1986. 29. SONDER-BALLONPOST. 1. BALLONMAIL ON ANTIGUA.
Austria, Cover
1986. 34. SONDER-BALLONPOSTFLUG.
Austria, Michel 1570, Cover
1978. 59. BALLONPOST.