German rocket scientist Wernher von Braun brought two 1930s vintage `` Nestler '' slide rules with him when he moved to the U.S. after World War 2 to work on the American space effort .
German rocket scientist Wernher von Braun brought two 1930s vintage `` Nestler '' slide rules with him when he moved to the U.S. after World War II to work on the American space program .