Thank you very much, Anik and GBarfoot!
I have looked into Emil's gallery very often, but never noticed this vase...
Seems to be the same as mine (and also a relative of the one to the right of it, with the Bohemia label).
So I can be quite sure it is Czech, then.
But if Emil hasn't found out what it is, it will be difficult I guess...
What about the pink colour -- quite unusual for Sklo Union?
At least I finally found a vase which doesn't take up too much space