XX IUPAc Moscow. International Congress of pure and applied chemistry in Moscow
- Catalog #
- 3218
- Year
- 1965
- Denomination
- 4k
- Color
- Blue, pink (luminescent), black
- Artist
- I. Levin
- Printing method
- Intaglio
- Perforation
- Harrow 11½
- Issued
- 4,000,000
- Description
- XX international Congress of theoretical and applied chemistry in Moscow. The logo of the Congress with the text in English: "XX IUPAc Moscow 1965" (the letters of the text, chemical symbols). The gas tanks on the background shape of the retort and the crystal lattice of the substance.
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