If I had to bet on this I would say Murano! The way the "wings" are pulled out and beautifully firepolished. Murano glass has such a tradition of very high polishing any tooling marks. I have a smaller 90% amethyst ( with the depth of the base giving an intense almost black centre to it, and clear 1/4 inch surround. I bet the same team made it and I bought mine as Murano but wondered aboyt Flygsfors. Seeeing yours has reassured me.
I wonder if the same guy worked at both factories. It is not unknown for a glass craftsman to go gipsy and get a job in Venice for a year..... the opposite is less likely but a few Ventian craftsmen have done time in Scandinavia, perhaps chasing a Nordic blonde....until winter and darkness sets in....
..and the wine and beer is so expensive, and legally restricted!