***
Hi. I think that is a Murano piece rather than Chirano, and the 'GF' label indicates Galliano Ferro. I have had a couple of their paperweights, and they were better finished on the base than this one, but I think it is genuine. GF made paperweights through to the 1980s, I believe. The canes look like mid 20th century ones, which would fit.
Alan