Forges4three

Look on the forward most plane of the vise under the screw and handle. It should read "P V CO" and this would make it a Prentiss Vice Company swiveling rear jaw machinist's vise. Otherwise known as a self-adjusting rear jaw vise. In my research, I've only seen the unique profile of the vise jaws ("U" shaped, arranged horizontally) on a Prentiss vise. There are no visible markings on my vise other that unreserved the screw handle. Dave

I've got this exact swage block and stand. Just brought it home today and was trying to locate the maker. Clicked on this thread and BANG! There was everything I needed to know. Thank for posting that link. Cheers! Dave