Mark with Japanese mark: 清寿 "Seiju" | #433138

清寿 "Seiju". This mark comes from a "menuki", decorative ornaments that are found in the binding of a sword and used to help with grip. It was designed by Seiju, who worked as a "soukenkinkou" in the Nara line of the Tsuchiya house. Soukenkinkou is the Japanese name for the makers of the accessories for bladed weapons.