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Issued by:
Czechoslovakia
Function:
postage
Date:
7/6
/
1987
Issue:
125th Anniversary of Union of Czech Mathematicians and Physicists
Denom:
50h
Color:
multicolored
Design:
J. M. Petzval, C. Strouhal and V. Iarnik
Watermark:
unwmk
Perf:
11.25x12
Catalog value:
Prev:
50h
Next:
9/3/1987 50h issue=11th Biennial Exhibition of Book Illustrations for Children d=Illustrated by Asun Balzola perf=11.25x11.5