That's an interesting vase, though I can't help with the maker.
I just wanted to make a comment about base finishes. I've got a few pieces of Polish studio glass which are signed and dated, but the base finishes are unrefined. I don't know why some artists -- paricularly Polish artists -- didn't pay more attention to the underside of their pieces.
Here are two from my collection: a rather ugly green cube with an indent on one side and a hole at the top, signed N '85, and a pretty inkwell-ish bubbly piece signed Skoczylas '85. (I don't know anything about either artist, but the pieces were purchased from a Polish art gallery in the 1980s.)
Anik
