I tore it all apart. Except for the seals and fancy bits near the handle. There are a couple set screws there. One is to (apparently) add hydraulic fluid.
Upon further www investigation, I have learned this is a rare PowRscrew vise from Wilton. Lucky me. Haha.
It has a hydraulic front end assist. Made in the late 60's to 70 or so. Apparently they stopped production for a reason.
Does anyone have any knowledge of the PowRscrew?
Everything is cleaned and lubed/oiled. Still will not open the jaws when I loosen the crank. I am able to manually open the jaws.
Interested in any input and feedback!
Here is a shot of the hydraulic aspect.
See the video in my original post to see it in action.