Franz Welz - a kind of line decor

This shape is new to me, I know it looks like I elongated but did not, the lines are pure powder in two shades of amethyst or purple. Very delicate and powdery. Big size too; about 10 X 6. If you look at other line decors you can see that “line” decors are not all created the same way - This type is unique

P.s. signed - Made In Chechoslovakia Welz stamp