Thanks Robbo and Max - I'd immediately discounted this as Czech when I got it because the base isn't right at all and I had owned and sold some small green Czech bowls which were very different in base and rim finish. I've had Arabia glass in this bright blue before also so the colour's not necessarily wrong for Finnish. HOWEVER, I think it could well be the large Frantisek Peceny bowl in Robbo's link because the distinctive slanted edges are clearly visible in the photograph - it's the base finish that threw me - it's not like any other Sklo Union glass I have.