I've read somewhere long time ago about the zippers. Lampo is a zipper manufacturer. Bal and many other brands buy zip from them. Those fakers can also buy a "real" Lampo zip and put it on their bags. So, actually, the zipper's not really a 100% sure indicator.
At first, when I saw your bag, I thought it maybe one of those oldies with the leather inside the zippy bag missing.
But wow!!! That Bal name tag's really a tell-all.
I'm not that good about that rounded rivet, but I can see clearly from your post now.
I hope you get your money back quickly and I really do agree this should really go to the library. It'll sure help lots of girls out there.