I know from other posts that you keep records of when you bought pieces. Do you know how old this pieces is? The main makers of scavo were Barbini, Seguso Vetri D'Arte, and Cenedese, as well as other companies. Most scavo is monochromatic, although Barbini added bands of colour. So your scavo doesn't strike a chord as far as those makers go. However, I saw some newly made Gambaro and Poggi scavo yesterday and they added foil and other applications to part of the predominately scavo piece. Is there foil added to yours? I keep going back to your picture, and I just don't see the green addition being on a Murano vase. Sorry to waffle, but sometimes I need to write to think, and, as usual, I could be completely wrong.
PS You have some lovely pieces, which causes me to have even more hesitation about my thoughts on this piece.