Thanks for the input, always appreciated.
Looking at images of Murano decanters, there are some ball type stoppers with a small flange top but nothing close to the shape of mine.
The top of my decanter could be forgiven to be Mdina, but the bottom and solid colour i dont think is right for them.
After a good search on google images i could find nothing that resembled the shape of my decanter and hardly any with that solid brown colour.
Will keep looking,
Tim