Modernist two-tone Czech enamel Glass

A wonderful and very useful design. Modernist point of view with triangles and 1/4 circles in two color enamel glass. Yellow and black, quite rare really. I do not see these very often and have not bought one of these two-tone colors in over 3 years. The shape is great because it works perfect for a any floral setting. Most likely designed by Karl Palda. Very high quality enamel paint, not hand painted after.