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Source:
Colnect
Issued by:
Russia
Function:
postage
Date:
11/25
/
1987
Issue:
Science in USSR
Denom:
10k
Color:
multicolored
Design:
Kolskaya borehole
Watermark:
unwmk
Perf:
11.5
Catalog value:
Prev:
5k d=Tokamak thermonuclear system
Next:
20k d="Ratan-600"
External links:
Colnect 175923..iet_Union_USSR
