Thanks m!
I have again looked through all Ariel pieces on the web I could find, and though I have to say that some Edvin Öhrström pieces are not as far away as I had thought (wonky button rims, flat polished bases), the overall look isn't right.
I also considered Dominick Labino, who made Ariel pieces and globe vases with button rim, but his work seems more "artistic", and should be signed as well.
Harrachov is still an interesting suggestion, but I am not able to find anything in the Czech resources.
A question regarding Ariel: as far as I have read these pieces are made by cold-working (sandblasting) the coloured blank, and then reheating it and encasing it in clear glass, leaving air in the recessed areas.
Classic air trap is made differently I think? With a mould?
Would the latter method more likely apply to my vase?
Thanks,
Michael