Thank you Christine and Ivo for your input, it is very much appreciated.
It was very reassuring see the bubbles in your vase Ivo, they are arranged horizontally and look similar in shape and size, I feel much more confident now.
I also have a bright yellow one which I forgot to put in the photograph. I would be interested to know which colours were like your glass Christine.
Does anyone else have the same in type in a different colour?