I don't know, but there is a good chance the PWT is Aureliano Toso. The unusual canes and the large size of the glass pieces in the ground look like them. If it is A. Toso, it is one of the nicer ones I've seen by them. Many of their paperweights are rather messy as if they were going from the 19th Century look.
I thought maybe AVeM when I first looked, but the colorful pinwheel canes are something I've seen on A. Toso PWTs. Until someone knows more, I guess the best we can say is Murano at the moment.