Is it really that cut and dried? It sounds a bit like all porcelain made in the Limoges region being referred to as being Limoges, which is misleading. If the seller had listed it as a Vessiere paperweight vase, rather than simply Baccarat, or even Vessiere of Baccarat, it would have been less potentially misleading.
I don't mean to be picky...............honest!
Cat
PS There was a C. Vessiere who designed wheel cut cameo glass for Baccarat, with those pieces usually being signed. Ref: 'French Cameo Glass' by Blount p.125.