Hi Anita-Many thanks for your contributions of information and insight.....
The base on this vase appears to be out of proportion to the height of the piece(too wide). When I saw the top of the rim, it seemed too "unfinished" for a Barovier & Toso piece. I know that the attribution is correct because I have a vase in exactly the same color and cane pattern, but it is one of the vases with the turned-down collar pictured in Pina's "Italian Glass,Century 20" book. This actually looks like(literally) the bottom half of one of those vases in the 12" version-the height measurement given in the posting seems to bear this out. Of course, this is just speculation on my part.