Thanks Guys. Here is a Athol # 12 with 3" jaws, quick release, opens to 3-1/2" and weights 14-1/2 lbs
454, thanks for posting your vise. I have a #1 too with the Nov 14 1871 Pat date with the quick set Dynamic but my jaws are 1-7/16 wide. maybe I will mark them with 1-1/2 jaw width.
Dunlap 5230. 3-1/2" jaws that opens to 4-1/2" Weights 17lbs. Might have been altered by adding two tapped holes and one precision hole in the Dynamic.
Looks like a Swayne Robinson Metl-Former vise from the 1950's minus the forming attachments. The vise looks the same but they usually had 6 holes (3 on each jaw). But they had at least two variations I have seen in print so there may have been more. Below are some photos I saw on Worthpoint.