The jaw width is 3.75".
It is 47" from top of jaw to bottom of the leg.
Found a 35 (or possible 36) stamped on the front of the jaw.
The leg has a stop or upside down cup two inches from the bottom. I had thought that the leg was made to be clamped to bench but now I see that the leg was supposed to fit into a hole not only for stability (left & Right, forward & rear) but also to allow hits.
I have been using it, it opens and closes freely, but just now put some grease into the screw. I almost didn't buy it because of it's size, now it is becoming more interesting the more I find out about it.
Where would I look for mark's?