![B5 type2 : 1957 - 17e courrier par Ballon de la Sarre - Wien 1957 B5 type2 : 1957 - 17e courrier par Ballon de la Sarre - Wien 1957](https://www.historiaphil.com/boutique/415-large_default/B5-type2--1957---17e-courrier-par-Ballon-de-la-Sarre---Wien-1957.jpg)
N°B5-2: Postal card "17th letter by Balloon - Wien 1957"
authentified postmark "Ballon OMO-DE-DZA" (Austria) 17. Ballonpostflug WIEN 28.04.1957"
+ arrival postmark Hollabrunn 29.04.1957
Cancellation (type2) St. Ingbert, Saar 23.04.1957 on 5F+2, 12F+3, 15F+5 "Reconstruction funds".
Data sheet
Specific References
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