Is there something you feel would add to the forum? If so, login and make your suggestion in the Board Discussion forum.
TC, is your plate actually marked 'KPM'? I only ask because the blue mark is very similar to some of the marks from the Royal Factory, Berlin.
Hi TC <waves>, is this site any use: http://www.auktion-bergmann.de/Katalog.aspx?a_id=3&s_id=304