There are many different artists that make this shape so it is hard to tell with certainty. I have seen the shape in Murano, Icet, and Chalet samples. One way I think has halped me in figuring out if a piece is Murano or not, is by how shallow/deep a bowl is. In ICET and Chalet samples I've noticed that the dishes are very shallow and thick. Im not too familiar with Scandinavian makers, so I cant say if it is Scandinavian.
Maybe there are other members that have seen similar pieces with actual labels and can let you know.
Hope this helps you out a little.