This is a nice old 8 inch adjustable wrench with the 10-15 degree offset on the jaws in relationship to the handle.  It is marked "B & C SPRINGFIELD MASS. U.S.A." on one side and "8IN  75A BEMIS & CALL CO." on the other side of the handle. The jaws are in good condition with light wear, no rust, a slight parallel mismatch between the two jaws. A nice old antique wrench, by a quality tool maker!  The No. 76 is far more rare than most of the S-Handle wrenches were and this is a nice example of that model.