Very nice!
Indeed, the finish of the base (broken pontil mark) is not consistent with any French paperweight maker of the "classic period"- they show all kinds of finish from polished concave to flat-
so this is one of the points for dating it to "post classic"- after 1900, but maybe before the 1950ies.
Stunning is the fact, that the metal rod for making it was much slimmer than the tool that Vasart used- at first sight, the base looks like a Vasart base, except for the much smaller pontil mark...
The style of Art Nouveau/Art Deco would have been much more elegant, and possibly had used other techniques like etching or metal lusters and shades- compared to what I said, the lilies have a somehow native, rural makeshift- this ethnic touch also makes me think of postclassic European weights...but again most of these have a flat ground base finish;
You are right- the filigrana and twisted canes are seen as rims, but I feel they must be much finer- maybe trial material that was still good enough for a series of friggers?
What it is certainly NOT: Russia 19th century, Murano, Bohemian/Silesian, classic French i.e. Clichy,St.Louis,Baccarat,St.Mande- and NOT Scottish-which I regret the most- (Ysart,Vasart,Strathearn or Perthshire).
Another possibility- I have seen Gentile weights from West Virginia/USA, they use foam grounds sometimes, but higher profiles and bigger size. The Coke is Coca Cola weights have the translucent cushions, but with inserted bubble nets.
I agree with Alan, who thinks of Belgium or France/Alsace or Loire district as a source, and hope for a local museum find to get some evidence! I also will ask Boisgirard for their thoughts,
cheers Erhard