I've got a few pieces by Orup, including the some of the Stromboli/Cinder line for Johansfors (photo 1) and Hyllinge (photos 2 & 4). The oxide inclusions are much darker and the only colour I've seen is this green in the Hyllinge one. Is there a blue version? I've looked at some of my other Orup pieces, too, and it's not Studio, although it looks closer to Spontana (photo 3), which is probably the one you meant as it was 1967. My Spontana has stronger colours and small bubbles only. It's worth looking at other Spontana pieces, though, so something to investigate.
Thanks.
P.S. I should add that, as Anita suggests, I have quite a few bubble/inclusion pieces, including Plus, Magnor, Randsfjordglass, Ekenas, and this is a little different from them all. Is WMF out of the question?