Sorry for the late reply. I've had a brief look through (not in any detail on each page as it is a huge book) and it seems to have similarities with pieces produced in the 1870s from what I can see. Nothing I can specify in detail but just the overall shape (no direct match to the actual shape but similarities with the neck and cup shape of the top and also the foot and stem) and the decorative details. I couldn't see a match for the decoration in black or the portrait.
But I think (just my view, not a definitive) it is possibly Bohemian rather than French as a first start for searching.
Perhaps Harrach and perhaps Josephinenhutte maybe also worth a search.
It's a knight's helmet isn't it?
Is it not uranium glass?
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