I agree with JimDawson, turn the vise over and let us know what it says on the casting. I had an old Kurt D60 that was missing the data plate, paint, and stickers. The only way I was able to ID it for sure was the casting information on the bottom. With a rebuild kit from Enco ($20) ,sandblasting, new paint, and some time on the surface grinder for the base and jaws it works like new! If it is a Yuasa or similar clone you should still be able to take it apart and give it a good cleaning.