This is quite a strange vase, since it quite closely resembles a Juda design for Skrdlovice from 1985. I attach a (pretty average) photo I took of one,
the problem is that the irridescent coating on yours is unfamilar to me, as is the spiral pattern. This, in the original design, is always made of bubbles not a thread. The colours can change as Beranek Glass made some variations, this is possible, or maybe a copy, perhaps Jindrich has seen this type of vase before in this exact format or a GMB member may have some 1990's catalgues showing some variations from the original pattern.
So for me it is either a copy of this Juda design by some unethical company or it may be a totally innocent variation on this desiign by the factories that were running in Skrdlovice, either Skrdlovice or Beranek glass.
Does it have a flat polished base? If possible a clear photo of that may help, I tried to put Czech in the title to help hopefully bring in some ideas,
Welcome aboard, an interesting piece,
Robert (bOBA)