Empoli may be a long shot because of the bubbles.
Cannot find any Walsh Walsh in this shape and none come up that have a ground but not polished pontil mark.
And the colour green doesn't appear to be the same as other Walsh Walsh Pompeian pieces.
The bubbles are nice, the shape is a nice one and well considered (not just a standard 'vase' shape) and the foot is nicely done and designed, and it does look to have age to it (does it have lots of wear on the base?), but I couldn't match it in my head to any of the other 'bubble' makers I can think of.
Interested to know, is it extremely heavy for size? I have an amber vase bowl with green streaks in that is inordinately heavy for size and just wondered.
Is there any information anywhere on the pontil mark finish on Arculus glass?
You might have to wait and see what comes up in years to come on this one

m