[GH85Carrera]

Here is a photo of a billboard that stood along Route 66 somewhere close to Oklahoma City, OK in 1941 according to the Oklahoma Historical Society. We have no information on "Yellow Cab Tetraethyl Leaded Gasoline" but the price must have been good for them to pay for such a large billboard. In 1933 there were 7 Yellow Cab stations in Okla City, one was on Route 66 at 2020 North Broadway. The stations were scattered all over Oklahoma until 1953. Mr. Harrell died in 1942.