This Day in Auto History: 7.5.1915 The Omaha, NE 1 ¼-mile board track opens with a 302-mile race won by Eddie Rickenbacker in a Maxwell 7.5.1933 Robert C. Stempel of General Motors is born in Trenton, NJ 7.5.1945 Julius Dorpmuller, the head of the Autobahn project, dies in Malente, Germany at age 75 7.5.1956 Oscar C. Kreis, a design draftsman with the Packard Motor Car Company 1902-1908, Chief Engineer with the Gray Motor Company 1908-1916, Chief Research Engineer with Continental Motors Corporation 191601932, and later a consulting engineer to the Studebaker Corporation and General Motors, dies at age 78 7.5.1974 Ralph Hamlin, driver of the first car to reach the summit of Mount Washington, NH and later a Franklin dealer, dies in Los Angeles, CA at age 93

Source: Automobile History Day By Day, by Douglas A. Wick