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Russia

postage

1961, Jul 31 unwmk p. 12

X

6k

multi

biochemistry symbols

1961, Jul 31 100th Anniversary of Kalevipoeg issue

X

4k

blk & bl & yel

Kalevipoeg

Democratic Republic of the Congo

1961, Jul 31 parliament reopening issue ovpted (no perf info) (9 stamps)

X	10c		ovpt, Kasavubu
X	20c		ovpt, Kasavubu
X	40c		ovpt, Kasavubu
X	50c		ovpt, Kasavubu
X	1fr		ovpt, Kasavubu
X	1.50fr		ovpt, Kasavubu
X	2fr		ovpt, Kasavubu
X	5fr		ovpt, Kasavubu & map of Congo
X	10fr		ovpt, Kasavubu in map outline

Greece

1961, Jul 31 Democritus Nuclear Research Center issue wmk. crowns

-	2.50d	redpur	Democritus Nuclear Research Center
-	4.50d		Democritus & Atom Diagram

1 to 13 of 13