I would guess Italian from the graceful gold surface finish.
So glad I have some feedback on the vase from you too....
I guess what has me confused about the vase is the texture and the shape. I haven't seen the shape or the surface described before on any catalogue or anywhere else for that matter, so Im not ready to call it a Murano piece yet. I have read about Corroso and Inciso surface textures, but this is totally different than those.
"Scavo" is a different technique altogether. I have a few pieces done in the technique and they are done with acid threatments, so the finish would be uneven.
I want to add, that when you look really closely at the texture, you can see the tiny lines that make the texture (which made me think machine in the first place). I guess it could be a type of "Inciso" technique, but I think the lines of Venini, Barbini and other "Inciso" pieces are deeper and large in width. I havent held one in person, but when looking at photos of this other examples you can see the lines pretty well, which would make them much wider.