
Well found.
That would seem to support the Rumanian rumour.

However, it is hard to tell if the rainbow irridesence is present or not; it doesn't have any odd surface features or pulls into odd shapes, (another common feature of these vases). And there is no image of the base to see if it is roughly ground.
It has the label, but I'm not absolutely
sure it is exactly the right sort of glass.
