My oldest wrench find to date. Marked D.H. CHAMBERLAIN, PATENT 1849. This was Patent #6210, Mar 20, 1849, Boston, MA. 15"L. Missing some sort of handle. With the screw in lower position, you can slide the jaw open/close. Anyone have one of these. Wondering if my adjustment screw is original, and if the handle would have been wood or metal.