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Source:
Colnect
Issued by:
Poland
Function:
postage
Date:
4/25
/
1951
Issue:
1st Polish Science Congress
Denom:
60g
Color:
green
Design:
Marceli Nencki
Watermark:
unwmk
Perf:
9-14.5
Catalog value:
Prev:
45g pur d=ZFvon Wroblewski nand KSOlszewski
Next:
1.15z cl d=Mikolaj Kopernik 1473-1543
External links:
Colnect 138430..ience_congress
Record of changes
