1910s Art Nouveau KPM German Blue Floral Porcelain Plate W Uncommon Markings

This is an antique KPM dinner plate, estimated to be from the early 1900s based on the style and markings. There appears to be the number 21 on the back of this plate and the stamp is a rarely seen KPM stamp. This is a gorgeous piece with no exact matches that I could find. Would be an excellent piece for a collector or someone who appreciates unique antique fine china. Plate is approximately 9.5 inches across