Showa retro, a large plate from a private collection, possibly Karatsu-yaki ware. I don't know the details, but it's from a private collection. It's very heavy and substantial. A large ceramic plate with a distinctive wavy edge, with a wooden box. - Material: Ceramic - Color: Greenish-gray - Shape: Square - Accessories: Wooden box - Design: Wavy edge - Seal on the back of the plate - Size: Approximately 25cm long and wide, 4.5cm high ▪️All photos are included. If you have any questions, please understand that I do not know the detailed origin as it has been stored in a private collection for a long time. The original box has age-related soiling. The plate itself shows no cracks or chips. ▪️As it is unused, it has not been washed. #SquareServingPlate #LargeSquarePlate #ShowaRetroLargePlate #AntiqueSquareServingPlate