Just a few extra thoughts thrown in ...
I know the item that Frank is referring to. It is not a regular paperweight in the sense of what know as millefiori or lampwork enclosed in a magnifying dome.
And, although there was a gap in paperweight poduction after the 1880s, the evidence of "Old English" items, believed to be from the 1910/20 period, shows that the techniques of, at least, millefiori had not entirely been lost.
Also, there are the so-called "Baccarat Dupont" weights from the 1930s period that are very much like the antique ones. [By the way, a French paperweight collector told me that "Dupont" is a name that is used like "Smith" or "Jones" in the UK and may not necessarily refer to an actual individual.]