Manufacturer unknown, but Two beautiful porcelain plates with a Showa retro design. The small black spots are black spots that occur when firing porcelain in a kiln. Particles floating in the kiln adhere to the porcelain and are baked in place, becoming part of the porcelain (also known as "furimono"). Basically, we consider this as a "flavor" of the old porcelain when it was made, and do not consider it as damage. Large...Diameter approx. 23.5 cm, height approx. 2.5 cm Small...Diameter approx. 20.5 cm, height approx. 2 cm #Noritake #Nikko #SangoToki #Narumi #RomanticRetro #ElegantRetro