Acquired this from Germany with a Sam Herman piece.
It's a full 30cm tall, opaque orange cased thickly in clear glass, with a row of controlled(ish) bubbles shot through with silver nitrate/chloride, and some additional nitrate/chloride to the rim.
Snapped pontil mark to the base. And bothery heavy.
I had assumed that it was German, but my handful of books on German glass haven't revealed anything very similar.
Thanks for looking.