Czechoslovakian 1Kć Stamp featuring Jan Evangelista Purkynė

This item is a Czechoslovakian postage stamp, meticulously printed in a monochromatic reddish-brown or sepia tone. The stamp features a prominent profile portrait of a distinguished-looking man, identified as Jan Evangelista Purkynė, facing left. His likeness is rendered with fine linework, suggesting a detailed engraving or lithographic process. The background of the portrait is subtly textured with horizontal lines. Above the portrait, the word 'CESKOSLOVENSKO' is prominently displayed in sans-serif capital letters, indicating the country of origin. To the upper right of the portrait, the years '1787' and '1869' are inscribed, likely denoting the birth and death years of Purkynė. The denomination '1 Kć' (one Czechoslovakian Koruna) is clearly visible in the lower-left corner. Below the portrait, the full name 'JAN EVANG. PURKYNĒ' is printed in capital letters. Small, almost illegible text, likely indicating the designer or engraver, can be seen in the lower left and right corners of the portrait frame, potentially 'J. SVABEK' and 'S. HOCZ'. The stamp exhibits a perforated edge on all sides, typical for postal stamps, and appears to be unused or in very good condition with no visible creases, tears, or significant discoloration. The printing quality is sharp, indicating good craftsmanship for the period. The overall aesthetic suggests a mid-20th-century design, likely commemorating Purkynė's contribution to science or medicine.