Famous illustrations of German porcelain hallmarks can be found on the PM&M website. These are the marks of Schumann & Riess and Carl Schumann. They include a caduceus in an escutcheon.
Two rods cross in the center of the caduceus with the letters C, S and A in the spaces made by the crossed rods. Other images show a rampant lion within an escutcheon with the name Bavaria above and Schumann below. Other marks are crowns, most with the name Bavaria beneath them.
The Berlin Porcelain company marks include a scepter or an orb with the letters KPM for Koenigl. Porzellan Manufaktur beneath it. Another shows an eagle holding a scepter and an orb in its talons.