Grizzly - yes ---- Penn State - no
I agree that the chuck is likely a Grizzly clone of the VM100.
Penn State's chucks [
SEE HERE] do not use a hex key system, and as far as I have been able to check, all of their Barracuda chucks use geared keys. I think many of these have "open" backs and would not have a place for the "Max. 3,000 rpm" writing.
Regardless, it is advised that owners of the Grizzly clone be aware that the "back" outside edge of this chuck can be quite sharp and deliver a nasty cut - this observation from personal experience. I have two of these Grizzly knock-offs and have rounded the sharp edge with a file and abrasives. Although not working as smoothly as the real Vicmarc VM100 (I also have two of these, and one VM120), these Grizzly chucks work acceptably and are a pretty good value.
To answer your other question - the Vicmarc jaws designed for the 3.5" Vicmarc VM100 will work on this Grizzly knock-off chuck. You should know, however, there may be some alignment issues - the threaded jaw holes on one of my two knock-offs are not located as precisely as the real McCoy, and are "off" a bit - making mounting different jaws a bit challenging. BTW - Don't expect to get any other kinds of jaws from Grizzly.
Good luck with your chuck, and be sure to ease the back edge if it is as sharp as mine were!
Rob Wallace