Germany became a leader in optical design, technical innovation and manufacturing of optical instruments during the 1940’s, specifically those crafted by Carl Zeiss, whose company continues to manufacture high quality optics to this day. The 10X80 20° binoculars were used by the German Navy (Kriegsmarine) on the Conning Towers of U-Boats to spot and shoot down aircraft of enemy bombers. The binoculars could be mounted directly on the anti-aircraft guns or used for spotting at