An antique natural wunderkammer glass display with marine life in the depths of the sea. The specimen is set up like an aquarium with sea stars, sea urchin, fishes, prawn, crustaceans, plants and stones. A detailed and decorative example from ca. 1900. It was used as teaching material in German schools. Old paper lable of the maker Koester & co, Lehrmittelanstalt, Muenchen (Munich). The front and the back of the case made of glass, the other sides are wood.