Thanks, John -- yes, very fulfilling

I had found quite a few Rozsypal Exbor pieces online, the ones with silver chloride inclusions, and the ones with narrow stripes, but this pattern seems less common...
What I still don't know: did Rozsypal just design the decor, or the shape as well? -- The same shape is also found with a Pavel Hlava decor, see the Egermann catalogue I linked to in my opening post.
Michael