This is most likely the signature of a single decorator or decorating studio. So far, both marks have only been found on coffee and tea sets.

M120719a
Shield with interlocking initials "FW" and crossed swords. Additional "BAVARIA" and "ECHT BLATTGOLD.".

M120719b
Shield with interlocking initials "FW" and crossed swords. Additional "GERMANY" and "GES.GESCH.".