This striking semi-postal stamp from Spanish Guinea (now Equatorial Guinea) was issued in 1953 to commemorate Dia del Sello Colonial. Featuring a delicately illustrated butterfly alongside botanical elements, the design highlights both natural beauty and colonial-era philatelic themes. The “10+5 CTS” denomination indicates a surcharge, typically used to support charitable or promotional causes. Printed in a vivid monochrome pink tone, it stands out for its clean engraving and elegant composition. A fine collectible representing mid-20th century Spanish colonial issues and thematic butterfly collections. Ideal for collectors of fauna, semi-postals, and African colonial philately.