USSR
Now showing: USSR - Postage stamps (1923 - 1991) - 1 stamps.
1986
UNESCO "Man and Biosphere" Programme
19. May WM: None Sheetsize: 50 Design: Yury Artsimenev Perforation: 11½
![[UNESCO "Man and Biosphere" Programme, type GSN]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/GSN-s.jpg)