There is indeed a Malta Decorative Glass Co. Ltd. registered in Malta as of 2000/1 according to the Maltese National Audit office but that doesn't get us very far.
Its most likely the formal company name for one of the makers we already know about .....but which one ?
I have emailed the Malta Dept of Inormation
Unhelpful reply from Malta Dept of Inormation.....it seems they haven't got any !! Just a ref to another Malta Gov't Dept.
So... I eventually found the Malta Yellow Pages and listed under glassblowers were:
Gozo Glass Ltd
Mdina Glass Ltd,
Mtarfa Glassblowers Ltd
Phoenician Glassblowers Ltd
So Malta Decorative Glass Co. Ltd would seem to be a different outfit from all of these and, it would seem, no longer trading.
Further reading of the Malta National Audit Office report 2000 reveals that the company was undergoing liquidation procedures at that time. Operations may have ceased some years previously.