Posted 5 years ago
I notice the main difference between Loetz and "other" spiraloptisch seems to me to be a Celtic influence in Loetz and an interpretation thereof in "other". The Loetz seems to be more stone-like to me and the "other" less so. I haven't a link to show, but the sgraffito-like curves and spirals are very reminiscent of the carvings that were uncovered in Europe in the mid 1800s.
Whether Welz, Kralik or other, I am not sure but this shade of pink, I would say 80% Welz.