USSR
Viser nu USSR - Post frimærker (1923 - 1991) - 1 frimærker.
1966
International Hydrological Decade
12. oktober VM: Ingen Arkstørrelse: 20 Design: B. Trifonov Perforeringer: 11¼
![[International Hydrological Decade, type DGT]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/DGT-s.jpg)
