I've done some research into cut to clear coloured glass windows and also the ' mousselinglas' of the plain clear etched interior panels.
Unfortunately I didn't find much for our windows but did find a pattern match here:
https://www.glassmessages.com/index.php/topic,69745.msg388677.html#msg388677Searching a bit further just now I've come up with this re the cut to clear coloured glass, which I don't think I'd noticed or realised before but I've not reread my whole thread (you have to click on the coloured glass panel and the info comes up on screen as you scroll) :
https://sashwindowspecialist.com/blog/victorian-window-glass/'A. & W. Schell in Offenburg Germany' - their source is 'Corning Museum of Glass: Mousselin Glas Fabrik, Glasmalarei & Glasschleiferei von A. & W. Schell in Offenburg, Baden '
Scrolling down on that link they show a number of patterns from Chance 1847 as well.
I've also just found this information from Pressglas Korrespondenz. It's in German so you will need to translate:
https://pressglas-korrespondenz.de/aktuelles/pdf/pk-2018-1w-sg-raspilaire-joseph-flasche-fischer.pdfThat's as far as I've got but I'm beginning to suspect my own cut to clear Art Nouveau windows were made in Germany or perhaps France even.
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