[MANHATTAN PROJECT]: A rare original United States of America war department diploma, one page, oblong 4to, Washington D.C., 6th August 1945. The partially printed document, completed in typescript, was issued by the Army Service Forces, Corps of Engineers, Manhattan District, and certifies that William E. Stringer of E. I. duPont de Nemours & Co. Inc. 'has participated in work essential to the production of the Atomic Bomb, thereby contributing to the successful conclusion of World War II'. At the base appears the facsimile signature of Henry L. Stimson (1867-1950) American statesman who served as Secretary of War 1911-13 and 1940-45, thereby overseeing American military efforts during World War II. Together with an original cloth insignia patch issued to the personnel of the United States Army Manhattan Project District, the blue background representing the universe, with a white cloud and lightning bolt forming a question mark (representing the secret nature of the project) which extends down to split a yellow atom, representing atomic fission, and with a red and blue star to the centre of the cloud, being the insignia for the Army Service Forces to which soldiers working on the Manhattan Project were assigned. Some very light, minimal age wear, VG, 2 E. I duPont de Nemours & Co. Inc., better known by the shortened name of DuPont, are an American multinational chemical company which were formed in 1802. During World War II, as the inventor and manufacturer of nylon, DuPont helped produce the raw materials for parachutes and tyres. The company also played a major role in the Manhattan Project in 1943 by designing, building and operating the Hanford plutonium producing plant in Hanford, Washington.