The green vase on the left has all the looks of Vittorio Zecchin from the early 1920's apart from the handles, on the corresponding shape the handles curle out at the bottom and not under curle at the top, I think that makes sense.
Not sure on the centre one at all, it looks a little too crudely made.
The one on the right looks as if it could be by Napoleone Martinuzzi from around 1930, but again it's the handles that don't look quite right.
Just my observations and probably not much help.
Paul