Thanks David, It is your suggesting American that helped the search.
There is a lot about him on the web Patti, and some beautiful pieces I would be very happy to own... well worth following up on to see all his other pieces.
I have just been going through Google under 'John Geci, Glass Artist', and came up with some wonderful links.
He is highly thought of, so can't believe I have never heard of him.
I wondered if the second row of writing under J. Geci might be a Roman Numeral style date or the Studio name?
There are contact details, and I am sure he would be happy to verify it as his work and explain the whole signature details.