No clue. I tried to narrow down the age by the general look after spending chronological efforts to near blindness. It has the look, to me, of things I have encountered from the 1920's and 30's but no joy there either. It may be a work holding device though it is pretty fancy for that and, if...
Hi. I just acquired one of these and do not see how the pin holding the screw comes out. i assume driving is the method but it is too long to drive out within the channel and the screw end does not protrude beyond the channel so I can whack it.
Other Wilton vise have similar odd things like...