Bernard,
Ah, this piece! I don't believe this is Antipodean. The moulding on this piece seems far too good to be Australian. I _think_ that there were only two blues ever made by Crown Crystal (Australia), one using uranium (predominantly in the patterns known as "leaf panels" and "rosette"), and a deeper, non-uranium blue appearing just before WWII (and possibly during the war). As in all of this glass, there is some degree of variability - I take it that the ingredients were lobbed into the pots without precision. The colour doesn't look right to me.
Australian glass is generally rough. Not just straw marks, but ripples, thickened sections, slumps and grit in the glass. It adds to the charm!
I would be thinking Europe, Czech or German - perhaps you should email Siegmar Geisselberger?
Hope that is of some help?
Cathy.