Katana by Suishinshi Masahide, the Musashi smith who, according to the original seller, championed a return to the old forging methods, published his technique in a dozen books and trained more than a hundred pupils, Naotane among them. In his final years he signed Amahide, and this blade, from 1820, is a work of his old age; the original seller describes it as a copy of Kagemitsu's kataochi gunome. It measures 69.8 cm in nagasa with 1.6 cm of sori: shinogi-zukuri, iori-mune and chū-kissaki. According to the original seller, the jigane is a tight ko-itame mixed with itame, with thick ji-nie and fine chikei, and the hamon a kataochi-style gunome with ko-gunome, ko-chōji and togari-ba, plentiful ashi and nioi-deki with ko-nie; the bōshi runs in midare and ends in komaru. The photographs show that gunome with its ashi. The tang is ubu, with kurijiri, sujikai keshō yasurime and a single mekugi-ana; the omote bears the signature 七十二翁天秀 (Shichijūni-ō Amahide) and a stamped seal, and the ura the date 文政三年八月日 (Bunsei sannen hachigatsu hi). It is kept in shirasaya with a double silver habaki and has no mounting. The NBTHK certified it Tokubetsu Hozon Tōken in 2013.