Hello Anne - my sincere thanks for your time and trouble. You are correct, and I had realized almost immediately after my post that I should have included the word 'Amberina' which is what comes to mind when you look at this particular colour combination - but I think I was side-tracked by the bubbles

For those GMB members, like me, who are unsure of the meaning of this word....................Amberina was a term coined first in the States (and patented there first in the early 1880's). Finished articles are manufactured from glass using a 'colloidal method' i.e. the batch used contains gold
distributed evenly throughout, and the piece is then shaped/pressed/blown or whatever. Before cooling, and whilst still very hot, certain parts of the glass are re-heated. When re-heated at a certain temperature, these areas of the glass turn red due to the inclusion of the gold. Typically, Amberina glass is characterized by showing these two colours of amber and red only. I don't know about 'Blenko' - is that also genuine Amberina, or simply coloured glass - I do know that Mr. Blenko (an Englishman apparently) - was heavily into stained glass, which of course is not the same thing at all.
However, I will go away now and look at your link, and let you know of my efforts. my thanks again, Paul S.