天保通寶 (Tempo Tsuba), 87mm, 55mm, 4mm, 86g., Red Oval Cast Iron (Tetsu). This large Japanese sword guard was first produced at Sanoda in Yamashiro Province. SCARCE! 天保通寶，塗上紅漆，鐵質，是日本十九世紀所鑄造的錢幣，即1835年，在江戶開始鑄造。