1894. Sanborn Map Company. Irwin, Westmoreland Co., Pennsylavnia, May, 1894. 1 map on 7 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
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1899. Sanborn Map Company. Irwin, Westmoreland Co., Pa., Sept., 1899. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1904. Sanborn Map Company. Irwin, Westmoreland Co., Pennsylvania, July 1904. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1909. Sanborn Map Company. Irwin, Westmoreland Co., Pennsylvania, September 1909. 1 map on 6 sheets : col. ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1919. Sanborn Map Company. Irwin, including North, East and West Irwin, Westmoreland County, Pennsylvania, Nov. 1919. 1 map on 12 sheets : col. ; sheets 65 x 54 cm. Scale ap... Sanborn Map Company.
1925. Sanborn Map Company. Irwin, Westmoreland County, Pennsylvania, August 1925. 1 map on 12 sheets : color ; sheets 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.
1887. Sanborn Map Company. Scale 1:600. 50 ft. to 1 in. Sheet 1 includes symbol key, index, index map, and certification signatures. Partial cadastral map. Fire insurance map... Sanborn Map & Publishing Co.
1892. Sanborn Map Company. Scale 1:600. 50 ft. to 1 in. Also shows factories, commercial occupancy of buildings, property boundaries and house and block numbers. Fire insuran... Sanborn-Perris Map Co.
1925. Sanborn Map Company. ca. 1:600 Partial cadastral map. Sheet 1 includes symbol key, index, and location and index maps. Fire insurance map hand colored to show building ... Sanborn Map Company.
1886. Sanborn Map Company. Jamestown, Pa., June 1886. 1 map : col. ; on sheet 65 x 54 cm. Scale approximately 1:600. 50 ft. to an in. Sanborn Map Company.