Any chance it is a modern piece by the Polish glassworker / paperweight maker Tomasz Gondek? I have seen some of his work that is very similar in style to antique Boho, but more vibrant colours.
Thank you for the suggestion, Alan. I agree it will likely not be very old: base is too clean, unless recently re-polished.
I have googled Tomasz Gondek and found useful images mainly on two sites ...http://www.millefiori.pl/
: Several weights, but single oblique views only: canes not very clearly shown, but look somewhat different; also none of the weights is faceted at all.https://www.westerncoloradopublishing.com/
: One weight only, but several views, including the base - which is etch-marked (my weight is not marked).
Conclusion - I consider Tomasz Gondek not very likely just now.
Then I checked for Silesian millefiori paperweights: some antique ones include canes which are somewhat similar, but then ....
The canes appear to be Muranese, but I don't know if that helps.
.... I have to agree with this - thought it myself. With Murano canes being sold all over the place, however, this does not mean, the weight was made there. What about the type of facetting? Does anyone have examples of Murano weights with similar facetting?
Anyway - I would like to follow the line of Silesian (Polish) weights. The man to be asked about antique ones would certainly be Marek Kordasiewicz - would he also be the one to be asked about modern ones? I'd like to find out - would anyone have contact details (possibly by mail - see mail button on the lefthand side).
Talking of the canes: would these (my weight) be complex canes, or just clustered when setting up the millefiori? The uneven lengths in some "clusters" seem to indicate individual simple canes - but would they be melted together as closely as the weight suggests?