M090639a
Crowned eagle with orb and sceptre above "MADE IN GERMANY" (note the weird Fraktur capital letter).
An eagle with orb and sceptre is of course often claimed to be either KPM Berlin or Porzellanfabrik Königszelt; those however both came with the initials "KPM". Other known users of such a mark were the Buckauer Porzellanmanufaktur, but they also used added initials ("BPM"). The version shown here is (as far as I know) never was positively identified and can also be found as impressed version, especially often on decorated porcelain plaques which come with the same nonsensical claims of manufacture.
A note on the weird letter at the side: many people believe that the crowned element shown are the ligated initials "L" and "R", however it is the capital letter "K" in German Humboldt-Fraktur lettering. The full name of this typeface is vital as Fraktur is the name of a whole font family whereas Humboldt-Fraktur is a specific type in that family. A crowned version of this weird letter is listed as mark family M100903.
M090639a
Crowned eagle with orb and sceptre above "MADE IN GERMANY" (note the weird Fraktur capital letter).