Austria
Austria, Michel 391, Mint never hinged
1923. 1000 Kr. 2 ex.
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.
Hungary, cancelled postal stationay
1920. BOSNIEN HERZEGOWINA 10 CARTE POSTALE KOLOZSVARV 1916 10 20. to Starubing, Niederbayern, Deutschland. ÜBERFRÜFT BUDAPEST 7
Austria, cancelled post card with stamp
1956. ÖSTEREICHISCHE HIMALAYAGESELLSCHAFT. WIEN 16.1.56.
Austria, Cover
1916. KuK FELDPOSTAMT 387 7. XII. 16.
Austria, cancelled post card with stamp
1981. 65. BALLONPOST.
Austria, Michel 392, Mint never hinged
1923. 1200 Kr. 4-block.
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, cancelled post card with stamp
1956. ÖSTEREICHISCHE HIMALAYAGESELLSCHAFT. WIEN 16.1.56.
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.