Paul; a beautiful plate it is. Overall this series is a good representative of both Aalto's works - it is amazing how "modern" looking things they designed those days! I believe the tumblers have been a top seller for Iittala as found in so many Finnish homes, like mine

As i do not know anything about glass the only way I hope I may be able to contribute to this site in return of the great advice it gives me is probably finding some interesting links or information from my country.

pamela: It is interesting Aino Aalto actually named the glass series "Bölgeblick" (as written by hand on the design drawing) although the correct or at least contemporary way of spelling would be "Böljeblick" as you wrote it. ("bölja" = oldish "wave" in Swedish, of course they would be pronounced the same way) There's a bit of playing with words for you Paul

like pamela says Aalto is "wave" in Finnish.
Although Alvar was born to a Finnish speaking family I think they spoke Swedish together with Aino (=2nd official language in Finland and by that time "upper class" very much spoke Swedish although there was this urge for nationalization, that is why so many surnames were changed from Swedish to Finnish e.g. Aino Aalto's maiden name Mandelin -> Marsio)