nooooo, you can't give up :huh: this one has got to have a higher chance of id if someone has said it is a known shape and given the area the glassworks is from.
I've been through Charles Hajdamach's 20th century British Glass and the Dudley museum resource and this site looking for S&W and can't see it, and I'm assuming that it looks art deco'ish possibly. But there are other resources.
I'm also wondering if it could come under Royal Brierley in searches if it was 30's piece?
And of course S & W could be completely wrong, so there is also Webb Corbett, and Walsh Walsh as well as Arculus and also Stuart and others I have failed to mention
There is a Stuart bowl in the book page 119 that is enamelled so completely different decor, but looks similar in shape and is 4 1/2" wide and has a cupped over rim that could look 'flattened'; if viewed from the top.
oh don't give up
I'm off to investigate Stuart further having seen that bowl.