Austria
![Austria 1956](/image/38019/base250X250/austria-1956-16-ballonpost-linz-ballon-omo-20-10-1956.jpg)
Austria, Michel 1026, cancelled postal stationay
1956. 16. BALLONPOST. LINZ BALLON OMO 20.10.1956.
![Austria 1956](/image/37916/base250X250/austria-1956-oestereichische-himalayagesellschaft-wien-16-1-56.jpg)
Austria, cancelled post card with stamp
1956. ÖSTEREICHISCHE HIMALAYAGESELLSCHAFT. WIEN 16.1.56.
![Austria 1956](/image/37787/base250X250/austria-1956-15-ballonpost-jungfernfahrt-des-oesterr-freiballon-omo-29-4-56-plus.jpg)
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 1955](/image/38016/base250X250/austria-1955-13-ballonpost-wien-ballon-zurich-10-4-1955.jpg)
Austria, cancelled postal stationay
1955. 13. BALLONPOST. WIEN BALLON ZÜRICH 10.4.1955.