I can see why you're thinking Motzfelt, very similar to her style. Her work is often cased tho with
not much texture to the outside of the vase. From the picture this one appears to have a textured surface?
It's probably not blown by her as she signed all her own work B.M. and year.
I've heard she occationally signed with her full name but haven't seen one for myself yet.
If it was BM design it would probably be Randsfjord Glass as they didn't sign much of their output until the 80'ies I think.
A Hadeland second usually is unsigned but can have an "x" or "+" scratched on the bottom.
Btw - the "unusual dimpled mug" in your gallery is almost identical to one I have signed Skruf (around 1980-90)