Casalibre- it looks very similar to a couple of Fratelli Toso vases I acquired a wee while ago. Light ,delicate and you can feel the murrines that make up the vase-inside usually shiny and the outside acid treated. One of mine has a slightly degraded acid finish. C1915-1925 would be about right-in one of my murano books there are a number of pages devoted to these lovely items Pina I think, Fratelli Toso Italian Glass 1854-1980, published by Schiffer. If I was at home in NZ I would go for that one- it looks right and the pictures are very good and have a lot of similarities to my two-three is such a lovely number for glass don't you think!
Hope my comments help-regards Carol