I can't find an Orrefors vase like this, and I can't get an Orrefors signature out of what I see written on the bottom. It looks more like Strombershyttan dimensions (shape and thickness of glass) to me, although I haven't seen this design. Could it be Strombergshyttan on the bottom, although I have difficulty making out to be that? 1983 would seem a little late for this piece.
David