This 12-1/2" adjustable/monkey wrench is 151 to 164 years old - manufactured between 1855 and 1868 in Springfield, Mass. Bemis and Call was founded in 1835, but wasn't incorporated until 1855 when the firm was incorporated as Bemis & Call Co. In 1868 the name was changed to Bemis & Call Hardware and Tool Co. It would have been between those two dates that "Bemis & Call Co." would have been stamped on their tools. After 1868, "Bemis & Call H & T" wo...uld have been stamped on their wrenches. This is a spectacular PA. estate find in really nice condition. It still has great jaws, operates smoothly, and with its all steel construction - it weighs a whopping 3lbs. 14oz. Outstanding tool to add to your collection.