Tigerchips, I think you're right that it is Murano. I've seen many perfume bottles and other things with this type of filigrana. It might be tough to track down without a label. I have the feeling that most of these types pieces were made in the last 20-30 years, but could be wrong. I've seen labels on some of the bottles, but don't remember who they were. A photographic memory would be wonderful, so I could remember all these things I see online.