Hi Bernard
Delighted I have been able to help, I have never heard the term maccette before either!
Martinuzzi was a sculptor who turned his hand to glass and re-invented the Venetian style which had been static for years with little innovation in design, fallen out of fashion and was consequently also in economic decline as glassworkers in other countries, e.g. Bohemia, had innovated greatly in the preceding period and cornered the market. (Not trying to 'teach my grandmother to such egg's here' Bernard, just a quick overview!). Roughly, I think his involvement with glass started around 1920. Follow this link for a short biography.
http://www.olnickspanu.com/Artists/Martinuzzi.htmlAlthough I am sure the basic shape is common, it is the delicate and sculptural foliage that, to me, suggests Martinuzzi. I don't have the Venini Catalogu Blu or I would dig a little further for you but I do have Rosa Barovier's Napoleone Martinuzzi book. Unfortunately, most of the text is in Italian! Don't think I can click back to original photos without losing what I have typed, but, from memory, the bases were a different and more arched shape and more simplistic than those in the photos which would again suggest Martinuzzi to me.
Veronica
Veronica