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Source:
Colnect
Issued by:
Mongolia
Function:
postage
Date:
3/31
/
1977
Issue:
250th Anniversary of the Death of Isaac Newton
Denom:
60m
Color:
multicolored
Design:
Watermark:
unwmk
Perf:
11.5
Catalog value:
Prev:
60m d=Airmail
Next:
60m
External links:
Colnect 247951.._Mathematician
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