signed “Hizen kuni Saga Ju Masahiro”肥前國佐賀住正廣Edo period, Circa 1640NBTHK Juyō Tōken MeasuresNagasa [lenght]: 70.2 cmMotohaba: 2.8 cm, sakihaba: 2 cmKasane [thickness]: 5.8 mmSori [curvature]: 1.82 cm Sugata [configuration]Shinogi-zukuri, koshi-zori, iori-mune, elongated chu-kissaki (3.6 cm) Kitae [forging pattern]Ko-itame hada with thick jinie and chikei Hamon [tempering pattern]: Nie-deki gunome and ō-gunome midare mixed to choji midare, the thick nioiguchi shows sunagashi, kinsuji, yo and ashi. Bōshi [point]Round at the end with hakikake kaeri...