Yes, there was a Gazelle I, II, and III. The latest mold has not changed since around 2000, maybe earlier(but i'm no expert)
I love them and throw the shiz out of them but again, I'm not an expert. I do believe that either I or II had some kind of a bead. Any 9x,10x,11x, or any reg production plastic - they are all gonna be the same mold. Also a very small group of CE out there.
IMO the more the money, the glows are the best around, although i mostly throw 11xs.