Looks like the Dynamic slide’s support has broken and then braised back In place. What ever plan you have in repairing this vise can be used as practice since the braised support was repaired.
Hey Bear. Not that easy to machine but would love to see how you make your split nut. Please post your work. I might have a drawing of your split nut if you give me the major diameter of yours.
Columbian 605-M2. 5” jaws that opens to 8” and weights 70 lbs.
Just finished restoring this one for a vise collector on the island. New jaws, handle’s and Bronze wear washer.
Thanks Sky. If you close the vise and take a measurement of the square slide‘s length then I’ll have the max opening to record. Here is a 5” Rock Island jaw drawing to see if it is the same as your jaws. Thanks for the great pics and your lucky to own this vise.