Hi Dave. Nice to welcome you back to the GMB β and, yes, you have been here before, or, more correctly, to this board's predecessor.
How did you favour Webb? I would have thought that any of the major Stourbridge glassworks (including Walsh) could have made it. It looks far too sophisticated to me for a one-off.
Eric Reynolds is conducting a data collecting and research project into strawberry prunts applied to pontil scars, as on the frame here, on both definite and possible Walsh, although usually positioned underneath a bowl or vase. If you can provide some close-ups and accurate measurements of these prunts and the similar feet, he would certainly welcome your material. I would be pleased to forward them to him if you don't have his email address. He may
be able to confirm or eliminate a Walsh attribution.