Alexander von Humboldt and monkey on post stamp

Keywords:

collection, stamp, picture, communications, postage, mail, post, postmark, label, zigzag, canceled, mark, philately, retro, Cuba, America, German, Humboldt, Alexander, vintage, voyage, zoologist, botany, portrait, naturalist, geographer, traveller, jungle, monkey, climate, historic, islands, discovery, travel, region, environment, extreme, activity, nature,