These WWII optics have been originally restored in a time-consuming process to reveal a crystal clear Image. Externally, hand stripping the paint inch by inch and polishing to the modern luster resembling a chrome finish. These binoculars were Primarily Used for Monitoring incoming aircraft and outgoing artillery fire. When teamed with multiple spotters they could vector both distance and height. Although used throughout the theater of fighting, their primary use was to protect the perimeter of the homeland from allied bombing. All these Binoculars have world-class optics by the known Carl Zeiss. The binoculars also feature four types of internal filters, or sun shades. There is clear, light gray, medium dark, and very dark gray. The light gray filters allow for better contrast in poor lighting conditions, and the very dark gray filter allows for objects to be viewed in bright sunlight. This filter was important to have due to the military tactic of planes flying in the sun so they couldn’t be seen from land. These binoculars were ruggedly constructed and were bulletproof, designed to withstand the perilous conditions of the battlefield. They aided in the following wartime tasks: daylight observation of enemy troop movements; directing fire from artillery toward advancing enemy troops and armor; directing fire at unfriendly aircraft; and night observation. The 45 degree angle is one of the most comfortable angles to help an observer sustain for extended watches. Each Binocular has a story to tell and we are proud to say that every piece is rigorously obtained from lost battlefields and hand restored at our workshop set in the heart of the British countryside. A stunning centerpiece for any home or office, each binocular has its own unique serial markings, which means no one else in the world except you would own this incredible, one of a kind, collectible piece.