http://img710.imageshack.us/i/roundtower1.jpg/
http://img716.imageshack.us/i/roundtower2.jpg/

What's it worth? The table had zero movement that I could feel by just
grabbing it and trying to shift it in either direction. Even when I threw
my weight against it. There was about 1/4 turn of slop in the X axis hand
wheel, and almost 1/2 in the Y. Both moved the table very smoothly and
easily. Its got square acme screws on the table. The knee handle (I guess
that is what it is) was broken and would need to be replaced or a new one
fabricated. It looks like a pot metal handle and so it could probably not
be welded. Its pretty simple though. I could make one easily enough.

Sorry about the lousy picture quality. I didn't think about taking a good
camera when I went to go look at it. Just had my cell phone.