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Nobel Prize Winner Nikolai N. Semenov, Scientist, the Founder of Chemical Physics. Date of issue: 28th January 2021 Designer: M. Podobed Paper: chalky Printing process: offset Perforation: comb 11 3/4 Size of a stamp: 32,50 x 32,50 mm. Size of the Miniature Sheet: 119,50 x 123,50 mm. Miniature Sheet composition: 9 (3 x 3) stamps Printing run: 135.000 Michel catalogue number: 2947 50 R. multicoloured. Nikolai N. Semenov, scientist, the founder of chemical physics. Miniature Sheet Klb.2947.

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