Unsigned attributed to Ko-Shōami
Round shape, Iron ground, Open work, Nikubori carving, Gold inlay, Contoured square Mimi edge, Both Hitsuana punches (one is filled with lead)
Momoyama period
73.3mm x 72.5mm 5.0mm thick (Mimi) / 5.4mm thick (Seppa-dai)
NBTHK(Tokubetsu Hozon) certificate