Edo period (1615-1868), 17th/18th century The first, an iron Owari sukashi tsuba pierced with a clock gear; the second, a Kanayama tsuba pierced with a design of autumn grasses, the iron bearing a rich purplish-brown color and "wet" patina The first with Hozon Tosogu (Sword Fitting Worthy of Preservation) certificate no. 435618 issued by the Nihon Bijutsu Token Hozon Kyokai (Society for the Preservation of the Japanese Art Sword), dated June 30, 1998 Each with a wood tomobako storage box 3 3/16in (8cm); 2 3/4in (7cm) high