Spiraloptisch - 1905

Various grounds: Candia, Candia with spreading dark green, ruby, crystal, crystal with spreading opal-violet, crystal with spreading aurora, crystal with spreading blue opal; also with a stronly iridescent surface as Spiraloptisch Silberiris.  The wall of the object forming a pattern of overlapping concentric circles rather than of spirals.

Note: Examples of the Spiraloptisch decor produced in either dark-green spreading to candia, crete to dark-green and leaf-green spreading to candia grounds are also known as "Fortuna".