Balloon
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.
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.
Austria, Michel 1613, Cover
1979. 62. BALLONPOST.
Austria, Michel 1693, cancelled post card with stamp
1982. 25. SONDER-BALLONPOSTFLUG.
Austria, Cover
1988. 80. BALLONPOST.
Austria, cancelled post card with stamp
1990. 84. BALLONPOST.
Austria, cancelled post card with stamp
1983. 70. BALLONPOST.
Austria, Cover
1990. 83. BALLONPOST.
Austria, Michel 842+, Cover
1956. 15. BALLONPOST. JUNGFERNFAHRT DES ÖSTERR FREIBALLON OMO 29.4.56. + ST. GABRIEL schutzpatron der post u der philatelisten WIEN briefmarken ausstellung 25 MÄRZ 1956.
Austria, Michel 1129, cancelled postal stationay
1963. 29. BALLONPOST.
Austria, cancelled postal stationay
1981. 65. BALLONPOST.
Austria, Michel 1569, Cover
1978. 30 JAHRE ÖSTERR. BALLONPOST.