I hope it's OK to add to this thread another bowl I've bought on ebay. The style is so similar with the domed base, blocky feet, lid detail also the diameter is the same. It is a very dark purple, not black as it appears in the photos. Probably just coincidence but this one was from a seller in Inverness. The seller mentioned above with the blue one was from Glasgow.
Does anyone know any Scottish glass-makers who made or makes this sort of bowl? I'm still not sure if these bowls are really Art Deco or modern revival, tableware or powder bowls.