Iron maru gata tsuba, Japan, mid-Edo period (1603-1868) Chased in sukashi marubori with two triffid dragons facing each other. Signature in silver nunome zogan on the seppadai, on the left the artist's name 信兼作 - Nobukane saku, on the right, probably the province but illegible (this signature may have been added later). Diameter: 8.2 cm