The image shows an old Imari sometsuke (blue and white) plate with a mark on the back. Features: The back of the plate bears the mark "Seika Nensei," which is often found on old Imari plates made in the late Edo period. Design: The surface of the plate likely features "Mijin Kararakusa-mon," a finely detailed arabesque pattern. Mijin Kararakusa-mon is one of the representative patterns of old Imari, and it is believed to convey a wish for good things to last a long time. Period: Based on the mark and design characteristics, it is considered to have been made in the late Edo period.