Thanks for the suggestions Sue, i looked at some Anthony Stern images and i can see some of the colours he uses are similar to the ones in my glass. Also the pontil finish seems similar.
All his work seems to be signed , i get the feeling my glass was not made by him.
The main colour of my glass is greeny/blue, could this be recycled glass ?
Only just noticed it has a drawn stem with an applied foot. (i need to pay attention)
With there being so many studio glass makers it may take me some time pin this one down.
Tim