USSR
Now showing: USSR - Postage stamps (1923 - 1991) - 1 stamps.
1951
The 150th Birth Anniversary of M.V.Ostrogradsky
10. December WM: None Sheetsize: 100 Design: V. Zavyalov Perforation: 12¼
![[The 150th Birth Anniversary of M.V.Ostrogradsky, type AUP]](https://swmedia-4cd6.kxcdn.com/media/catalogue/USSR/Postage-stamps/AUP-s.jpg)
