Hmmm. didn't see that before, Lynne. I don't think it's 3Fiori myself, although the small flowers are similar.
Having seen the Clichy-style roses in three different weights now, and mine having the label, I'd be tempted to say they were all Mazzega weights. However, I know from Jackie Lindsay, the Murano paperweight expert, that some of the weights which were labelled ALT were made by 3Fiori, and that many artists seemed to make weights for different glasshouses.
I think we need a Murano expert to speak on this one!