Thank you both for your input

John I've been wondering whether it was made in one piece with the foot drawn down from the stem and body ...or vice versa rather . That's what it looks like to me. There isn't any evidence it was joined with a clear join but it could have been done that way, very carefully I presume? That is what is curious. So my thoughts were that the white glass may have been an opalescent frit which when added to the gather has gone opalescent on reheating or cooling.
When I say old, I just meant that I didn't think it was made yesterday but that's just a feeling on looking at it. I honestly have no idea of how old it could be but I don't think it's an old old shape if you see what I mean? It just strikes me as a shape that might have been made late 1800s onwards really.
And I'm not even sure it is Italian (shape/application of handles). I'd been wondering if it might have been made elsewhere but can't think of where apart from Lauscha. But then, would it be lampworked glass most likely?
m