nice bowl Trevor, and they do indeed weigh a ton. I have a similar one in amber, which if I can find it, will post a pic of later. In the meantime, if you punch 'flair range' or 'Webb's flair range' into the Search facility, you will get quite a bit of related and interesting information on this range of controlled bubbled art glass from Webb. I would think yours is almost certainly a 'flair' item.