I did a search...
It appears there was a Butterfield & Stevens Company in 1853, morphing through several names to William Butterfield Co. by 1870. The machine they made was a 'patent wax thread machine' (used for boots?) I could not find pictures. So, is it that old? Or might it be a badged machine made in the 1900s? Can you post a pic, or find a picture on line of something similar?