Hi Bart, I looked at the two pieces you supplied numbers for on ebay, and I would agree that both of those pieces are early glass. The problem with this piece in comparison to those pieces was noted by Snesbit earlier. If you examine the crimping pattern on the two ebay pieces there is a quite well executed pattern to the upper vase portion where the crimping has occurred. The crimping is quite pronounced and is a pattern that includes all of the layers of glass being formed (if that makes sense).
In contrast to that, the crimping on your vase is quite crude and appears to be simply an indented line in thick glass. This type of crimping on your vase, would be, IMHO a quality indicator that would make me lean further towards a contemporary production piece than a period piece. The quality of the crimping does not, to me at least, seem to be indicative of early production glass, but much more modern and rushed production...... It appears to me to quite quickly and haphazardly executed.
Additionally, the execution of the bubbles seems to be quite inconsistent, and there is a twist in the stem that I think also points towards fast production.... and not early glass...
Any one of the things I have noted could potentially be explained away as a single observation, but IMHO, the fact that there are several aspects of the design that point towards contemporary, I would have to go with that as my assessment. I do not know for sure if I would attribute it to being Italian, but I believe it to be reasonably contemporary....
Craig