Air transport
Austria, Cover
1988. 37. SONDER-BALLONPOST. 1. KINDERDORF-BALLONPOST IN SÜDTIROL.
Austria, cancelled post card with stamp
1991. 85. BALLONPOST.
Austria, Michel 1158, Cover
1964. 6. SONDER-BALLONPOSTFLUG.
Austria, Cover
1991. 85. BALLONPOST.
Austria, Michel 1879, Cover
1987. 35. SONDER-BALLONPOSTFLUG.
Austria, Cover
1987. 78. BALLONPOSTFLUG.
Austria, Michel 1620, cancelled post card with stamp
1979. 62. BALLONPOST.
Germany, Michel 670, Cover
1938. 25 Pf. Zeppelin BABENHAM? 11.8.38.
Austria, Michel 1111, 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, Cover
1988. 36. SONDER-BALLONPOSTFLUG.
Austria, Cover
1984. 71. BALLONPOST.
Austria, Michel 900, Cover
1957. 17. BALLON POSTFLUG TAG DER LUFTFAHRT WIEN 101 28.4.1957. + TURRACH 13.3.56.
Austria, Michel 1917, Cover
1988. 36. SONDER-BALLONPOSTFLUG.
Netherlands, Michel 468, Cover
1959. RAKET VLUCHT. 1 + 5 C. GEVLOGEN MET POSTRAKET A. LINCOLN 10-9-59. Inverted print NEDERLANDSE RUIMVAART
Austria, Michel 1101, Cover
1962. 28. BALLONPOST. SALZBURG 26. X 1962.
Austria, Michel 1270, cancelled post card with stamp
1968. 40. BALLONPOST.
Austria, Michel 1604, cancelled post card with stamp
1979. 61. BALLONPOST.
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.