Made by Bison-Bial S.A., as slowtwitch alluded to, in Poland, as dutchgray stated. I just found one last week. A search on the big 'Vises of GJ' thread up on the General Discussion board will yield many hits. It is a highly-regarded vise from a highly-regarded European OEM. Did you turn the spindle yet? You'll be surprised to see the rear jaw move in reverse. The front jaw is the static jaw! How wide are the jaws? If it feels like it weighs 100 lbs it must be a 6-incher. Mine has 4" jaws and weighs half that. If you're interested in seeing pics, I posted several in the 'Vises of GJ' thread linked
here and even more in the post immediately following.