It does use a TPG insert, and I suspect the suffix "VD" means Vibration Damping. The screw I see on the bottom probably indicates an interchangeable head, for grooving, or a different insert, etc.
If I weren't trying to sell off some of my stuff right now, I'd be interested. I do have a few bars of that size, and bigger, but can't do anything right now.
But please don't forge it into something else so quickly. It's a valuable bar.