Very doubtful. Signoretto is a master glassblower - this vase is a simple form with a surface decoration mostly found on Roumanian glass, and no particular glass skills come into play. I also douibt if anyone from Murano would sign 'Murano, Venezia'
What do other members say, I wonder
Incidentally, please try not to use allcaps which is the internet vrsion f shouting :-)