Star Tool Co.
Bevels, Levels, Marking Gauges, Squares
Three companies with this name were simultaneously operating in Connecticut, Rhode Island and Vermont, confusing many historians and tool collectors. To further the ambiguity, this company made a bevel patented by Leonard D. Howard on 5 November 1867, who was living in St. Johnsbury, VT at the time. Rights to a marking gauge patented 21 April, 1868 by W. Brodhead of Meadville, PA and a caliper/divider patented 22 February, 1876 by Thomas McDonough were assigned, though it's unclear whether they ever made the latter. A Starr company produced squares during the same time and is possibly a typo or variation of this company.
TOOL CO. (in a star), STAR BEVELS (in a star)
Nelson, Robert E., Ed. (1999). Directory of American Toolmakers: A listing of identified makers of tools who worked in Canada and the United States before 1900. Early American Industries Association.
One Star rule is in the Davistown Museum IR collection