Sword Guard (Tsuba), ca. 1615–1868, Metropolitan Museum of Art: Arms and Armor
H. O. Havemeyer Collection, Bequest of Mrs. H. O. Havemeyer, 1929 Size: H. 3 1/4 in. (8.3 cm); W. 3 in. (7.6 cm); thickness 3/16 in. (0.5 cm); Wt. 5.1 oz. (144.6 g) Medium: Iron, copper-gold alloy (shakudō), gold, copper
https://www.metmuseum.org/art/collection/search/34443