Thanks for the comments and welcome,
I have been watching and reading here and elsewhere for some time.
The glass disease has been incubating for many years, and it started to break out during 3 months around Europe on an Eurailpass in 1994, with brief time in Scandinavia (including a stay at Riihimaki). A month driving around southern Sweden in 2000 included a visit to 6 SmÃ¡land glassworks, and purchases at MÃ¡lerÃ¡s, and looking through galleries and antique/junk shops in obscure places. Lately, every time that I consider that the Swedish collection is large enough, another temptation shows up!
Difficult photographing such a clear and reflective bowl foot, but finally did it in Macro mode. An ISP that blocks Yobunny is not very friendly, Christine.
Bubble pattern is a right-hand spiral, Pat, underside does not seem to be ground or polished, slight circular pattern as though the hot glass had been smoothed while being rotated or spun, small circle in centre does not look like a ground-off pontil.
I thought that I might be able to paste a reduced size composite picture here, but looks as though I will have to place it in the Yobunny site and link it.