Frankfurt am Main folding map, Falk Verlag Hamburg, 1961, with some pencil notations by me (from 1961). Also shows trolley and bus lines. If you click the enlarge button then you get a 1920-pixel wide ...

US Army Frankfurt map from 1990, sideways for "technical" reasons, found on the 3rd Armored Division website. The remaining text is from there: U.S. ARMY MAP OF FRANKFURT in use in the 1990's.