need help please identifying bowl!!

Hi everyone, my name is rosy and i hope you will be able to help me identify :- a) the maker of the glass bowl in the pictures which i am hoping to be able to post ( fingers crossed). b) the signature under the base.
The bowl is double walled with blue and green swirling stripes.
Thank you in advance for your attention. Rosy
Photos at these links -

Thanks very much.

Hi all. I sold the said bowl on ebay and the buyer was kind enough to tell me the name of the glass blower. Orlando Zennaro who worked for Murano in the 1960s but went on to open his own glass studio, which is where the said bowl was made. Thanks anyway. Rosy.