That there is a beauty of a carving vice! It's call a "Pro- Carver Positioner". I have three of them in my shop. I purchased mine from Woodcraft about 7 years or so ago. They stopped carrying them because the vender could'nt keep up with the demand. They are definitely built to last. The only place I know where you can get them now is here:
www.woodcarverssupply.com, go to the left of the screen at departments, scroll down to and click on, "work positioners" and you'll find all information availible on this vice.