this is the other one from this morning, and since I'm unsure of maker, have posted in Glass. Doesn't have that W/Fs. 'ding', or even quality of glass, and polished pontil mark is quite small in comparison with the size of bowl. No marks that I can see, and diameter is something like 12.1/8" - 310mm. Although I've never seen an amethyst bowl like this before, I'd plump for Webb (who knocked out a lot of wares in this colour) - and who didn't always, apparently, back stamp their pieces. OR, might it be Richardson perhaps. Anyway, great looking piece - provide you have half a shelf to devote to one bowl

Grateful for any thoughts and thanks for looking.