This is a nice old 10" adjustable wrench marked "BERGMAN TOOL MFG. CO. BUFFALO NEW YORK U.S.A. 10 QUEEN CITY PAT. PENDING FORGED STEEL" on the slides of the S shaped curved handle. The jaws are in very good condition as is the entire wrench surfaces.  No rust or damage very clean.  A hard to find antique wrench, by a quality tool maker!