Hi again Mark. I wouldn't say that the label is misleading, since it is Swärds' own label. It was not at all uncommon that different firms bought "raw materials" (i.e. vases, glasses etc) from other factories and decorated them in various ways. The label on such a product is almost always that of the decorating firm, rather than the glassworks that produced the actual glassware.
Thank you for the pictures! These are called "Double-walled coiled bowls" in one of my books, and is one of Hugo Gehlin's most famous models. It is also the one single model by Gehlin where the likelihood of it being signed is highest (I have three of these myself, and two of them are signed). Otherwise, signatures are generally very rare on glass from Gullaskruf...