I have (next to other names) seen this claimed to be Franz-Anton Mehlem (Bonn), Gebrüder Heubach (Lichte), RS Prussia (Suhl) or Royal Bayreuth (Tettau), not forgetting Erdmann Schlegelmilch (Suhl). Go ahead, take a guess!

M231206a
"PÂTE SUR PÂTE" above "MADE IN GERMANY".

M231206b
"PÂTE SUR PÂTE" above "MADE IN GERMANY", here with hand-applied mould/pattern code.