AN IRON AOIGATA TSUBA WITH INOMEBORI (boars-eyes piercings) at the four corners, decorated on the face with four cloisonné roundels depicting flowers on a blue ground, three more on the reverse, with small gilt and silver hanabashi in takazogan, and a tiny copper kiku, unsigned, the iron plate tachikanagushi work, 18th century, the enamels later, possibly by Hirata Harunari, first half 19th century