not really my area Ben, I gave up Scandi a long time back, but I have lots of books

I suspect that all pieces of this approximate teardrop-shape go back to Gunnel Nyman's design which she created for the 'Serpentini' vase in 1947 - the best known one having a piece of spiral coconut toward the base, and am sure you're right and all genuine examples will be signed.
Variations include controlled bubble examples which are presumably the ones you're thinking of........... the pair shown in Pina & Vigier I imagine.
I could be wrong, but looking at the bubble structure and formation - between the Finnish examples and this one - there appears to be a lot of difference. The Nyman pieces show much smaller and less patterned bubbles, whereas the Norwegian bubbles are larger and more 'mesh-defined'.
I'm still in favour of Magnor for this one

Ref. 'Scandinavian Glass 1930 - 2000 - Fire & Sea' - Leslie Pina & Lorenzo Vigier - 2006.