Defence Exhibition 1956
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1956
Defence Exhibition
9. april VM: Ingen Arkstørrelse: 100 Gravering: F. Hudeček Perforeringer: 11½
![[Defence Exhibition, type OS]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/OS-s.jpg)
![[Defence Exhibition, type OT]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/OT-s.jpg)
![[Defence Exhibition, type OU]](https://www.stampworld.com/media/catalogue/Czechoslovakia/Postage-stamps/OU-s.jpg)
