Air transport
Austria, cancelled post card with stamp
1989. 82. BALLONPOST.
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?
Austria, Michel 1787, cancelled post card with stamp
1984. 28. SONDERBALLONFLUG.
Austria, Michel 1146, Cover
1965. 33. BALLONPOST.
Austria, Michel 1661, Cover
1981. 65. BALLONPOST.
Austria, cancelled post card with stamp
1977. INT. BALLONFLIEGEN. EDUARD SPELTERINI.
Austria, Cover
1988. 36. SONDER-BALLONPOSTFLUG.
Austria, Cover
1981. 23. SONDERBALLONFLUG.
Portugal, Michel 629+, Cover
1940. SIR ROWLAND HILL 5x 1,75 E. + 2x 1 E. to The President of the Canadian Flying Clubs Association Ottawa. Censor.
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.
Mint never hinged
1910. GRANDE SEMAINE D’AVIATION DE LA CHAMPAGNE. REIMS DU 3 AU 10 JUILLET 1910. 250.000 FRANCS DE PRIX
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.
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?