Guesswork more or less, but I would think pieces in this style could be Romanian...
>> This one is not really the same, but I regularly see pieces with this decoration (vases in similar shape to the one in question as well), and at least twice with a label "Made in Romania".
Another possibility would be "Lux Glass" Austria; but though the blue stripes would fit quite well, I have never seen this kind of pulled lobes decoration on a Lux Glass piece...
Michael