Now showing: Poland - Postage stamps (1930 - 1939) - 12 stamps.
3. květen WM: Žádný Sheetsize: 4 (2x2) Design: W. Boratyński, Wł. Vacek Perforation: 12 x 12½
![[The 5th National Stamps Exhibition, Warsaw, type ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Poland/Postage-stamps/0291-b.jpg)
3. květen WM: Žádný Sheetsize: 4 (2x2) Design: W. Boratyński, Wł. Vacek Perforation: 12 x 12½
![[The 5th National Stamps Exhibition, Warsaw, type ]](https://swmedia-4cd6.kxcdn.com/media/catalogue/Poland/Postage-stamps/0291-b.jpg)
15. září WM: Žádný Sheetsize: 1 Design: L. Sowiński Engraving: Wł. Vacek Perforation: 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)
15. září WM: Žádný Sheetsize: 1 Design: L. Sowiński Engraving: Wł. Vacek Perforation: 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)
15. září WM: Žádný Sheetsize: 1 Design: L. Sowiński Engraving: Wł. Vacek Perforation: 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)
15. září WM: Žádný Sheetsize: 1 Design: L. Sowiński Engraving: Wł. Vacek Perforation: 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)