Issued in 1953 by Spanish Guinea, this striking semi-postal stamp features a detailed depiction of a grasshopper, showcasing the territory’s rich insect biodiversity. The bold monochromatic blue design highlights the anatomical structure of the insect with scientific precision. The “5+5 cts” denomination indicates a surtax, typically used for charitable or colonial development purposes. Inscribed “DIA DEL SELLO COLONIAL 1953,” this issue commemorates Colonial Stamp Day, making it both thematic and historical. A fine example of mid-20th century colonial philatelic art.