Old quality stemware identification required

I purchased these wonderful glasses about a year ago and have searched high and low to uncover their origin without success. There are glasses manufactured by Stuart crystal that are kind of similar but not identical, this is the closest I have come. They are amongst my favourite glasses as their quality is immense and they look stunning, very well manufactured. Unfortunately there are no marks at all to underside. I have around twelve glasses in total, all the same pattern. Any suggestions would be really appreciated. Regards Alex