I searched this thread, and the vise info thread and did not see this posted so I thought I would share.
Waller's Quickvise
Emco Mfg Co.
Los Angeles, CA
The vise is marked Pat Appld For, and I found the patent 2204837 by J.A. Waller
Filed 1938 granted 1940.
This vise reminds me of the...