1959 West Germany Alexander von Humboldt Commemorative Stamp (40 Pfennig)

This is a single postage stamp issued by West Germany (Deutsche Bundespost) in 1959 to commemorate the 100th anniversary of the death of the renowned polymath, geographer, and naturalist Alexander von Humboldt. The stamp features a central portrait of Humboldt in casual attire with a cravat, executed in a detailed steel engraving style typical of mid-century German philately. The color is a deep Prussian blue on a cream-white paper base. Running vertically along the left edge is the text 'ALEXANDER v. HUMBOLDT' and the dates '14.9.1769' over '6.5.1859', marking his lifespan. The right vertical edge reads 'DEUTSCHE BUNDESPOST'. The denomination '40' is located in the bottom right corner. Physically, the stamp features standard comb perforations (approx. 14 gauge) which appear mostly intact, though there is a slight rounding on the top-right corner. The centering is moderately well-balanced with slightly wider margins on the right side. There is no visible postmark (canceled-to-order or postal use), suggesting it may be in mint or unused condition, although the reverse side gum condition cannot be confirmed. The engraving quality is high, showing fine lines in the hair and clothing, which is a hallmark of the high-quality craftsmanship of the Bundesdruckerei (Federal Printing Office) during this period.