More pictures would be helpful.
From the picture you have, it looks like some kind of table for fixturing parts, could index, could tilt, could mount on something else.
I wouldn't hold your breath on price. Even if its a brand name, manual machining tools like that have lost a TON of value since CNC became so affordable. I would think you'd be doing pretty great to get $50 out of it if all the parts are there and it's in good shape. Hard to get good money for REALLY high end rotary tables, dividing heads, indexers and things like that these days, much less a shop made one.