I thought the vase looked familiar and I remembered I had one exactly the same, which I had attributed to Zemek in 1955. However, I was wrong. Robert is right about the base, which is the same on mine. Also, I put the vase next to my Zemek candleholders (definite) and clearly the wrong shade of blue. Finally, I compared to the other vase that I'm sure is Zemek 5530 and it's different.
I've got a couple Aseda knobbly vases, and this one is different from them as well. So I would say other Scandinavian. Skansen, not a name familiar to me, is one possibility, and Magnor is another.
David