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Source:
Colnect
Issued by:
Greece
Function:
postage
Date:
7/31
/
1961
Issue:
Democritus Nuclear Research Center
Denom:
2.50d
Color:
red purple
Design:
Democritus Nuclear Research Center
Watermark:
crowns
Perf:
Catalog value:
Prev:
6/30/1961 10d multi dt=Minoan art d=Minoan vessels
Next:
4.50d d=Democritus & Atom Diagram
External links:
Colnect 61703-..nergy_research
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