Polen
Viser nå: Polen - Postfrimerker (1860 - 2024) - 1 frimerker.
1938
The First Planned Flight of a Stratosphere Balloon-Chocholowski Valley
15. September VM: Ingen Arkstørrelse: 1 Design: L. Sowiński Gravering: Wł. Vacek Perforering: 12½:12
![[The First Planned Flight of a Stratosphere Balloon-Chocholowski Valley, type ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Poland/Postage-stamps/0293-b.jpg)
