I did in fact send these pictures to Malta, and today have a reply from Phoenician Glass as follows:
""Good Morning, Thanks for your query, I have shown the pictures to my colleagues who have been the glass blowers at Phoenician Glass for the past 30 years and we regret to inform you that this piece does not originate from our factory.
Regards Greta Fenech Manager Phoenician Glass Blowers Hut 140 Crafts Village Ta’ Qali""
I have of course thanked them 'afterwards'

- so still searching for maker.