DDR Stamps Set of 5 - 250th Anniversary of the Academy of Sciences

This set of five stamps commemorates the 250th anniversary of the Academy of Sciences in Berlin. The stamps feature portraits of prominent figures in science and philosophy, including: * Leonhard Euler * Alexander von Humboldt * Gottfried Wilhelm Leibniz * Max Planck * Each stamp has the text '250 Jahre Deutsche Akademie der Wissenschaften zu Berlin' (250 Years of the German Academy of Sciences in Berlin) around the portrait. These stamps are in very good condition and will be a great addition to any stamp collection.