It might also be worth posting this on the paperweight board. It looks like a stem of a goblet from the photograph?
Something like this (but these are very old)
https://www.christies.com/en/lot/lot-4264883This site often has a good collection of Josephinenhutte items:
https://antikes-glas.de/products/Pokale-Kelchglaser-c153502262 From what you say you have the books that seem to me most likely to be able to identify this.
I could not see anything similar in Paperweights, Jargstorf.
It's a whole world of info and knowledge out there on paperweights of that region from what I can see reading online but you have the book 'Kordasiewicz, Marek, Glass Paperweights, The Heritage of the 19th Century Riesengebirge and Isergebirge Glassworks' already. Is there any paperweight in the book with that cane in it?
There is nothing similar in From Neuwelt to the Whole World.
I think the paperweight collectors would find it very interesting.
m