Hiya,
Thanks for making the point about how often these bowls turn up, Frank

Bernard, I am with you on this. Since there is no positive attribution for this particular group of posy bowls they could come from anywhere, including, of course the UK, so it is important to be circumspect. However, it seemed pertinent to draw attention to the assertion most often made over the years,
without any positive proof. I certainly was
not saying in the absence of any other satisfactory explanation, 'let's call 'em Czech!'
Frank has a labelled piece on his website of another, similar styled, item, and I have owned another (in my case the sort with diagonal stripes and mica); each have/had Czech labels. Certainly not proof for the posy bowl in question, merely a parallel that
may have relavance in view of similar characteristics used in the production of the various pieces.
Until such time as some form of proof occurs, you are right to suggest other sources for thier production.
Kind regards, Nigel