Anyone familiar with this shift knob? Is it old, newer, still available? Right above the crest emblem it says "Personal". Isn't that a division of Nardi? On the bottom it says "patent" and "made in Italy". Inside the mounting hole says "9/16". I think it's leather, but not 100% sure. I'm trying to decide if I want to use it or get rid of it. I assume it just mounts using a crush ring like an original knob.