This Looks to be a Really old Shapleigh Hardware Pocket Knife. Its Fat at one end, almost looks hand made. The single blade has a weird crook at the end that looks to be original. The wood is dark, not sure what it is, and is has a thumb rest. There are four steel (?) rivets on both sides, they vary in size. It is marked; SHAPLEIGH HDW CO. ST. LOUIS MO. It measures 5 1/2 inches long open and 3 1/2 inches closed. It is 1/2 inch wide at the small end and 1 1/8th wide at the widest part. Minor oxidation.