Yes, there were vintage Lampo zippers on some 03s... but that's not a genuine one.can’t say anything about the bag, but thats a real Lampo zipper. Thats what they used to look like, although I don’t know if that style Lampo zipper was ever used on Bbags
03 Flap from this thread has a real one https://forum.purseblog.com/threads/question-about-old-style-lampo-zipper.381053/