At the War Production Board, Silvermaster was able to provide the Soviet Union with a large amount of data on arms, aircraft, and shipping production. In June 1943, Silvermaster sent a War Production Board report on arms production in the United States, including bombers, pursuit planes, tanks, propelled guns, howitzers, radar and submarines, sub chasers, and the like, to Soviet intelligence. Then, in December 1944, the New York MGB office cabled another Silvermaster report stating: "(Silvermaster) has sent us a 50-page Top Secret War Production Board report ... on arms production in the U.S."