Issued by Deutsche Bundespost Berlin in 1978, this 40 Pfennig commemorative stamp celebrates the III. Schwimm-Weltmeisterschaften (3rd World Swimming Championships) held in Berlin. The vivid design captures swimmers in action, emphasizing strength, motion, and the competitive spirit of aquatic sports. Set against bold blue tones, the stamp reflects both athletic excellence and modern German design of the late 1970s. It remains a key issue for collectors interested in sports philately and Berlin postal history.