I have just brought home a pair of vises from Dr. John Wittner's estate. R.I.P., our good man. Your legacy is in good hands here.    Now, I am trying to figure out what I have, here. And the matter of vises, overall. The larger one (28 pounds!) is called a "utility vise" and has a substantial anvil section and "exposed screw." A Columbian C44, Cleveland, Ohio, that looks like it lived on the back bumper of the Wittner race van. (I wish!) The Craftsman is a more typical "wor