My quick reaction is not Venini. Paolo Venini did some pieces in Zanfirico in the 50's, but they were a cleaner, more modern design than this. (I'm not disparaging other styles, btw, as I like Salviati pieces in this style).The colours are also wrong. Plus no signature? Unusual for Venini.
How does the glass feel, is it relatively thin or thick glass, and what's the pontil like, smooth or rough?
I've not been too on the ball with Murano lately so other points of view would help us both. I do think it's Murano, I should add, although it could be from a quite a range of years.
David