Reed Vise
Originally posted here: http://dayid.org/tools/reedvise.html, but that page now just redirects here.
You can see the original source here: http://dayid.org/tools/reedvise_backup.html.
Since getting my Reed No 23, I've been hunting for information about them, so here's a little bit of information about the ones I have found. The majority of the information here was originally sourced from Garage Journal & Practical Machinist.