Pictures 7 Boston Manufacturing Company, Waltham Massachusetts Tweet 1979 TOP FLOOR OF 1814 MILL LOOKING EAST. 1979 TOP FLOOR OF 1843 CONNECTOR LOOKING EAST. 1979 TOP FLOOR OF 1843 CONNECTOR LOOKING WEST. 1979 TOP FLOOR OF 1816 MILL LOOKING WEST. 1979 TOP FLOOR OF 1816 MILL LOOKING EAST ALONG NORTH WALL. 1979 TOP FLOOR OF 1816 MILL LOOKING EAST ALONG SOUTH WALL; INTERNAL ELEVATOR HOUSING AND MECHANISM AT REAR.