With the help from many pages of vise restorations, I set out to restore an old Columbian 503 I had. It went through a process of disassembling, degreasing, electrolysis, prime, and paint. Other than a little touch up, it's pretty much complete.
One question is finding another model similar so I can attach a date to the vise. I have never seen one with a spindle like this. The ends are a very heavy knurled design. Any help would be much appreciated.

One question is finding another model similar so I can attach a date to the vise. I have never seen one with a spindle like this. The ends are a very heavy knurled design. Any help would be much appreciated.

