it looks old, ive got a book 'Murano , a history of glass' by Gianfranco Toso,
Ive just had a flick through it, interestingly, there are a few examples of quite delicate glasses,
with a similar blue rim, wait for it , 16th and 17th Century !!
If that were the case uh!! I suppose you would have to find someone to give you an attribution,
maybe a Museum, the V & A in London, in the USA i dont know, maybe Corning ?
Someone correct me please, if im totally barking up the wrong tree, or if anyone knows
a Antique Murano expert?
Jack, please dont get too excited by any opinion i am suggesting on here,
Id like to think theres a chance im on the right track (me and my weird theories