Do you think the book might have the goblet wrong then? Having looked it up because I remembered that browny amber colour, which for some reason just never reminds me of Bohemian glass, and looked again just now, the engraving is I would say, almost identical in type (matt) and the actual design of the flowers and leaves and how they are engraved and how they are laid out on the glass in design, on the Plaine-de-Walsch-Vallerysthal goblet. The goblet is also flashed in panels. It dates to c1845-1860 according to the book.
Of course that is not to say they weren't doing that identical design in matt engraving on browny amber flashed glasses many years later, or indeed at another factory in another country, but I think given the remarkable similarities, then they have to be in the frame as maker?
He says it fluoresces - 'Fluorescence: Jaune vert intense "fluo" '
And gives density as 2,49 (cristal sans plomb)
m