and that was my thought also!

damn, I have been searching for this since you posted the weight

Just a question - I am of course aware that glass travels a long way, but I just wondered if you look at where that was being sold from (the region) were there any glassmakers that are known around that area going back in time?
We used to own a house down there, I was only ever aware of wine at the time

not of knowing of any glass specifically, but there is a glassmaker based down there, or was a few years ago, and I recall one town having the maker and a glass gallery etc. so perhaps glass was historic in the region?
Just a thought, because of the type of item.
m