Hi Carla - welcome to the GMB
As they say in the legal profession - 'you shouldn't lead the witness'.
Assume your reference to the Gulf of Venice is, at the moment speculation only …….. hope you won't be offended by my comments, but it's better to let the folk here provide the answer, unless of course you do have a genuine reason for suggesting Seguso. Regret I too haven't a clue as to attribution, and you may know vastly more than me about similar makers, which wouldn't be surprising at all - is there something about this piece that does in fact suggest that particular maker?