Gorgeous, Rare German Ernst Gravenhorst Mosaik Blocks Set ceramic plate I am not 100% certain

I am not 100% certain the maker of this piece

but it's definitely got some years on it

which is without a bottom

The expressive but subtly rendered brown

Gorgeous, Rare German Ernst Gravenhorst Mosaik Blocks Set ceramic plate I am not 100% certainYou know I love my Color Cubes, but these gorgeous old Mosaik blocks give them a run for their money; just gorgeous! I have searched a bunch and not found another set like these (I would buy them up if I could find them), which I believe are German (the torn bottom left corner of the box I would guess says Hamburg); though I can find no reference to Ernst Gravenhorst anywhere. At any rate, the rich, glossy painted colors are fantastic, and as with