Research ship and bathysphere on post stamp

Keywords:

collection, stamp, communications, postage, mail, post, postmark, mark, philately, correspondence, picture, image, retro, vintage, Mongolia, gray, ship, bathysphere, searchlight, floodlight, ray, light, quiet, sun, symbol, year, international, global, research, ocean, water, underwater, geography, geological, biology, octopus, shark, fish, study, exploration, science, climate, region, travel, discovery, weather, scientific, expedition, nature,