This might be Norwegian as Cat mentioned, I don't have any definitive info on this piece but I see a lot of them here
and seem to recall them being marked as norwegian.
Likely suspects are Randsfjord Glass (paper labels until late 70'ies), Hadeland Glass (altho most HG artglass is signed)
and Magnor (paper labels until 80'ies i seem to recall).
It's not the coquille series, one distinguising thing with Coquille, apart from the color palette, is that they were
all designs based on sea life, typically shells (coquille in french), sea anemones etc.
You should see white, clear and typically a "sea" toned green, blue etc.
I think most of the coquille range is signed also?
It could be swedish, in the 40-70'ies swedish and norwegian glassworks swapped people all the time
and designs were copied with small variations. The swedes were better at signing their work tho.