This is a good clean, useable, heavy duty antique C-Clamp, marked "SARGEMT & CO. 13" in raised cast lettering. This is a nice thick cast iron, very nicely made tool, that has a 3" capacity, and certainly heavy duty enough for metal working. In good condition, no rust, good threads, good swivel pad on the screw, and a nice wing type thumb screw. There is some pitting noted, but not rusty. A very hard to find old machinist tool!