This may be of interest, it was at the bottom of an Ebay listing:
If you know the whereabouts of one of the following, somewhat obscure, U.S. anvil brands, please contact Richard Postman, author and publisher of Anvils in America, at 320 Fisher Court, Berrien Springs, MI 49103: American (with serial number on front foot), American Scale & Vise, American Skein & Foundry/Badger (decal), Baker, Bay State, Boston (as part of logo), Bradley, Butts & Ordway, Champion, Colonial, Columbia (not to be confused with Columbian), Cranberry, Cray Brothers/BROs, Dunn & Murcott, Eaton, Empire (Tulsa), Gipsey, H.C. Co (H. Cannon Co.), Hoover, James Case/Case, Macarco, Nelson/Big 4, NOHAB (Sweden), Oak Leaf, OmSteel/Omaha/O/S, Pegley, Phoenix, Red Barn, Rev-O-Noc, Riverside, Rock Island, Samson, Southern, Southern Steel & Supply/SSS, Star (six pointed star with diamond or circle in it if it has patent dates on it), Thomas, Vulcan Tool Co. (farrier anvil), Woodruff or Yost. In particular he is interested in a high quality photograph clearly showing the anvil (horn to right) against a solid very light colored background and the logo and any other markings which may be on the anvil. A good way to bring out stamped letters or numbers is to lay the anvil down and dust with flour. Brush off excess flour, leaving it in depressions. Sometimes characters jump out and sometimes the placement of a single one can help identify the anvil. Also report weight. If you would like assistance in identifying an anvil you have you can contact me through the Ask the Seller a Question feature.