Insurance maps of Ambridge, Beaver County, Pennsylvania, Feb. 1911. 1 map on 15 sheets : col. ; 64 x 54 cm. Cadastral map. Title from sheet [1]. Oriented with north to the upper right on some sheets. Feby. 1911."" Township of Economy noted on sheets 8 and 9; ""At French Point"" on sheet 10. Includes sheet index map, street and ""Specials"" indexes, key, notes, and text."". Scale approximately 1:600. 50 ft. to an in.