The eBay listing from brianpmulcahy says that the bowl is by Barbini. Is the suggestion that this label is a Barbini label? It's a label that you see quite a lot, so I would be concerned if everything with this label was identified as Barbini (and not because there is a big difference in quality between this bowl and a Barbini for Weil bowl). The two most likely explanations for this label I've heard are, one, it was the label of a Murano company, and, two, and this came from what I would say is reputable and knowledgeable dealer, that the label is associated with Campanella.
Any other possibilities?