This is a tea bowl that my mother, who had a long history in the tea ceremony, cherished. After research, it appears to be a "Kizeto-yaki" tea bowl. I don't have much knowledge about the tea ceremony, so I'm sorry, but I don't think I can answer any questions. Please examine and consider the photos. Also, the paulownia box for this item is missing. Please understand that I will carefully pack the item. Although it is unused, it has been stored at home for a long time. I hope someone who understands this will purchase it. Please refrain from price negotiations.