Unusual Royal Bavarian Porcelian Mark

I have a cobalt blue double handled cake plate with gold edging and a scene in middle. Half of the mark has worn from back but I can make out Royal Bavarian China in a circle around a KM over the number 8. Above the circle is a crown and under is printed Germany. This stamp is in green.
There is an additional blue stamp with what looks like two cursive letters and in red is a 6 (about 2 inches away). My research has not turned up this Bavarian makers mark. Please help!

From: Identifying Royal Bavarian China

Most current day markings will actually say "Royal Bavarian China," as well as the country in which it was made. For instance, the Royal Bayreuth is a green stamp in the shape of a circle with a crown on top. It has the words Royal Bavarian China and Germany within the stamp.

So probably a late 20th Century piece.

Actually, delete 'late'. Made some time in the 20th Century.