Many thanks Ivo. It gets a bit confusing when, as in the link above, several pieces are attributed 'probably by Bimini of Austria or Lauscha of Germany.' And that's a Glass Encyclopedia . .
However, apart from looking at lots of pictures I've been reading more, and very interesting it is too. Fritz Lampl seems to have been quite an extraordinary person.
I really appreciate your sharing your knowledge and expertise, Ivo. It has sent me on a wee quest and I have learned from it (though goodness knows how long I'll retain it for - not long I fear!).