This thing has me interested in how it was made now that I look closer.
About 20mm from base of upper globe I can see a join between the two.
I can't feel any join on external or internal at all. It's what I can see at the correct angle appears to be a very faint horizontal line, not in colour at all, more like a fused join. It's not a tide mark from water inside at some stage in it's life.
It corresponds to the position of the rim in the eBay example.
Yet there is absolutely no change in curvature of the globe at the join, no any difference in colour between the two. Absolutely no jointing lumps or bumps internally either, except for one little black spot felt internally at the joint which had me taking a closer look. No difference in wall thickness across the piece at or near apparent join.
Whoever made these things, it's highly skilled manufacturing process involved.
Amazing stuff this medium. I just can't help thinking ... how did they ever do that?
Are those handles typical of any euro style known folks?