Sorry for the late reply. Been away

you are right Paul, I think it's just reflections and light but it's a nice effect. Sommerso it is, clear glass with, forgive me my colour naming, lilacy pinky colour but then seems to have an amber tint from another angle

John, it looks the same as in your link. Absolutely no way of telling if it's signed. Through my loupe I can see or make out letters but could just as easily be a scratch as a letter/number as it's so badly worn.

I re measured with more care and this is 20 cm in height. Scandinavian it is then. Sadly as I mentioned, too shabby to list but looks good cleaned up and on my shelf. (It does mean I have the feel of this, always helps to handle nice glass) Thanks for all the help with this piece.
Pete.