Balloon
Austria, Cover
1981. 23. SONDERBALLONFLUG.
Austria, Cover
1981. 23. SONDER-BALLONPOSTFLUG.
Austria, Michel 1571, without gum
1978. 30 JAHRE BALLONPOST. FREIBALLON D-TREVIRA BORDSTEMPEL.
Austria, Michel 889+890, cancelled postal stationay
1957. 18. BALLONPOST. VILLACH BALLON OMO 9.XI.1957.
Austria, cancelled post card with stamp
1985. 74. BALLONPOST.
Austria, Michel 1553, Cover
1977. 57. BALLONPOST.
Austria, Cover
1989. 38. SONDER-BALLONPOST. 1. BALLONPOSTFLUG IN KAP VERDE.
Austria, cancelled post card with stamp
1983. 70. BALLONPOST.
Austria, Michel 1658, Cover
1980. 64. BALLONPOST.
Austria, cancelled post card with stamp
1990. 84. BALLONPOST.
Austria, cancelled post card with stamp
1981. 65. BALLONPOST.
Austria, cancelled postal stationay
1989. 82. BALLONPOST.
Austria, Michel 895, Cover
1956. 15. BALLONPOST. JUNGFERNFAHRT DES ÖSTERR FREIBALLON OMO 29.4.56. + Besuchen Sie das heeresgeschitliche Museum Wien 21.3.58.
Austria, Cover
1985. 31. SONDERBALLONPOSTFLUG. ISRAPHIL 85.
Austria, Cover
1982. 67. BALLONPOST.
Austria, Michel 1787, cancelled post card with stamp
1984. BALLONPOST-AUSSTELLUNG.
Austria, Michel 1271, Cover
1968. 40. BALLONPOST.
Austria, Cover
1986. 75. BALLONPOSTFLUG.
Austria, cancelled post card with stamp
1985. 30. SONDER-BALLONPOSTFLUG.
Austria, Michel 1597, Cover
1979. 61. BALLONPOST.
Austria, cancelled postal stationay
1988. 79. BALLONPOST.