That's what I thought, looking at the first pic Ivo, but if you examine the texture of the enamels from the inside, in the second pic, blown up, the way it is done is quite different to the way it's done at WMF to make Ikora.
It's also very highly distinctive of Ysart glass - and sometimes seen in the unidentified Czech glass that can be mistaken for Monart - the stuff Frank has christened "Cellophane".
I'm sure WMF use a technique involving cold water to crack the surface to which enamels then get introduced, while I'm positive this is done using a "splodgy" marvering technique - but with clear splodges.
Monart Cloissonee WAS made using a cold water treatment to crack the surface before introducing enamels into the cracks.
(I find it quite fascinating - it took me a long time wondering how it was done before I had the "Eureka" moment of; "It's clear splodges!" :pb:)