This piece dates from the late Edo period to the end of the Edo period/early Meiji era. There's a depiction of some kind of plant on the inside. A ring line is drawn on the outside, and it's quite cool. I think it's a rare gem, something that seems like it would exist but is actually quite unique. There are chips and cracks, but they blend in with the whole and add to its beauty. I have washed it with regular detergent, but I don't think all the dirt has come off completely, so please be aware of that. Diameter: Approximately 18.4cm Height: Approximately 7.2cm Sizes are approximate. The actual item may differ slightly in color from the images. As it is an old item, there are age-related scratches and stains.