Keith, your images are helpful. The hand vise with the screw is most like the third from the left, but with a wood handle. Your picture on the right has similarities to my tool, but my tool shows no signs of the spring or keeper on yours. Interesting that the notch on the inside rear of the handles is similar. not sure why it is there. It would have been interesting to see these tools in operation.

http://www.bakercollectors.com/