How about this
Used from around 1870 until 1920, 'FRANZ ANT. MEHLEM' and 'BONN A/ RHEIN' (Bonn upon River Rhine) in a ring around the stylized initials 'F-A-M'.
http://www.porcelainmarksandmore.com/germany/northrhine/poppelsdorf-02/index.php
Very pretty thing.
