Description: This vintage 3 Kčs (Czechoslovak koruna) definitive postage stamp belongs to a mid-century "Professions" series honoring various labor sectors and academic fields under the Czechoslovak Republic. The central monochrome illustration shows an intent male chemist raised in profile, carefully holding up a test tube to evaluate a reaction while gripping a laboratory flask in his other hand. Set against a solid dark red background, the finely lined sketch seamlessly integrates a structural diagram of a carboxyl group (-COOH) directly into the scenery behind his outstretched arm. The top margin displays the country name "ČESKOSLOVENSKO" in a clean sans-serif typeface, while the lower left corner features the denomination. Tiny text along the lower edge credits the design work to artist Mario Stretti on the left, and the meticulous intaglio carving to engraver Bohdan Roule on the right.
Circa: 1950s
Condition: Used - Hinged
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