Totally impossible to tell from one picture, probably authentic if she purchased it at a reputable vintage/consignment shop, and not all Chanel bags have names. In fact, only a handfull do. The names we generally refer to bags by in this forum are not their official names and if you say something like "east/west bag" it's likely the SA will have no idea what you're talking about. Chances are Lauren's does not have a name.