Robert:
I'm unable to suggest anything very positive for this vase. The blue seems a little bit too strong for mid-century Scandinavian glass, and most of the pieces were pretty hefty, with a significant amount of clear at the bottom. Holmegaard did make finer pieces but the blue is wrong and they're signed. If I had to pick a possible Scandinavian company, I'd suggest Aseda. However, as you say, the base doesn't seem like a Scandi.
I hope this will provoke somebody who knows more than me. Has Marcus or Jindrich seen this vase?
David