Hi m,
another voice from Austria: yes indeed, a very fascinating and attractive weight- and the opinions of experts are pinpointing
the problem already. No doubt, by the actual state of knowledge, a French weight, and factory 8 a good working title.
Maybe someone from the St. Mande works made the facscinating roses- they made roses with shards of white glass and very complex canes- but sorry there's not yet a match with an identified St. Mande rose cane to your example.
My first question is always- is it "lead glass"? Antique weights from France, England and the USA are known to be made of this kind of glass. Antique "Bohemians"- there is only one supposed source with lead glass (Egermann).
attached a very small rose cane by St. Mande, this time a micro "collapsed tube" type, kind regards E.