Of the German factories, I think Hirschberg is more likely than Friedrich, but the thinness of the glass layers and the external colour of this vase aren't really synonymous with either factory.
My best bet is torn between Empoli although, again, the very thin casing is a worry but this cinder-toffee colour was very commonly made there, and China, where the thin casing of 'watery' white would have no problem fitting in.