GERMANY. Weimar Republic. "Graf Zeppelin" World Tour Silver Medal, 1929. PCGS SPECIMEN-64. Kaiser-511. Diameter: 36 mm. By O. Gloeckler. Obverse: Jugate busts left of Zeppelin, Durr, and Eckener; Reverse: View of earth from the North Pole, with the route of the airship highlighted by various stops.