Set of 5 Showa-retro plates. I believe the brand is Koransha, but I no longer have the box, so it's uncertain. There is the character "彩" (aya, meaning color/design) on the back of the plates. I received these several decades ago and they were displayed in a cupboard. They have been used very little and are in beautiful condition. Although they are old, there are no stains or marks, and they show no signs of use. The original price is unknown. I will sell them for 500 yen per plate.