There is a drawing of a filing vise in the Blacksmith’s Journal on page 822, Volume 06, Feb 1996. It is a contribution from Francis Whitaker. I took a picture of it when I was at his shop in 1999. I had recently acquired one for my shop. I have never used the tool for an aid in filing. I use it mostly for clamping things when I’m doing torch work.
I never really thought about it being an unusual tool until I did a web search and couldn’t find an image of another like it. There are many images of other types especially for holding saw blades.
The hinge pin broke recently so I replaced it with another I made from a 60d nail.
Whitaker shop filing vise.
My filing vise with new hinge pin.