This mark (as well as the related M110214) was sometimes claimed to be a trademark used by Bavaria Keramik Handels GmbH from Altomünster (Bavaria). However, the company in question was a tiling firm that supplied and installed wall and floor tiles, so it had nothing to do with china. Many people believe that this specific mark is not Bavarian or German, but an Italian post-WWII imposter.

M110203a
Circular mark containing a four-leaf clover abobe "GRÜN KLEE", "BAVARIA" and "GES. GESCH.".