I believe the Nizet glasshouse was in Liege. I think I have read that they were making lead glass, or experimenting with it in 1720-30 or so, a long time before Zoude.
I was simply wondering if Nizet is synonymous with Liege. If not how do you distinguish between the two and those produced by Zoude, who was making lead glass. The tight wrythening seems to be very much a Belgian trait.
Ive been looking at Corning and the Zoude catalogue. I know that this is deemed to be spurious but from your pictures, those on scottish antiques and the catalogue there are definitely some patterns that seem to repeat for Zoude / Liege / Nizet glass, the nut/honeycomb/fraise moulding on bowls being one, the tight wrythened bowls and the "torsinee" moulded stems, which were obviously dip moulded and twisted before being applied to bowls.
I bought one glass from Mark West web site, an "English ale glass" , but it looks as though these were made on the continent too. Its a fascinating hobby and the endless hours that can be spent on research and trying to decipher the point of manufacture appeals to me. I have become an armchair detective in later life.