I think that is a parker. They used the "semi-steel" marking on their vises. it's what's referred to as a double swivler. it swivels in two directions. I hate to break the news since you missed out on it, ya it's pretty valuable. It's impossible to put a dollar value on it because it varies by region. I would have broken my arm Ito whip out $95 fast! I'd say that would probably go in the $250-500 range pretty easily. How wide would you say the jaws were?