Can't help with the identification....but would ask especially since you have indicated that you are on a tight budget, ask why go for a hydraulic clamp vise?
Perhaps this is a "Euro" thing.
Been in this business a long time and although i do own a hydraulic vise (needs rebuilding, and have never bothered) really don't see the advantage to the hydraulic clamp setup.
In fact for my dollar the Kurt angle lock vise setup i think is superior in having the force applied as a vector when closing the jaws on the work that forces the movable jaw down against the vise body as well as against the work.....giving less tilt to the sliding jaw....
Seen lots of shops running thousands of parts here in the states, and don't think i have ever seen anyone running a hydraulic vise......Lots of variants on the mechanical screw designs....Kurt, Orange, Chick ect.....
Never felt like i couldn't get the work tight enough using a simple screw closing vise...In fact just the opposite..often feel like i need to back down the clamping force to avoid tweaking the work, especially on
thin plate stock.
Personally if looking to max my benefit per cost, i would rather have a good mechanical screw vise over an average to poor (as above) hydraulic...Further, i would look to getting one that had square sides,
the types that allow clamping on their sides (NC ?) which further expands their versatility and usefulness.
Cheers Ross