An Echigo tanto

An Echigo tanto
Muromachi period (14th century), signed Nagayoshi
Sugata [configuration]: hira-zukuri, with very shallow curvature, mune-hikushi
Kitae [forging pattern]: itame
Hamon [tempering pattern]: chu-suguha
Boshi [tip]: o-maru
Nakago [tang]: suriage with sensuki file marks, one mekugi-ana, hira-yamagata
Habaki [collar]: single gold-clad copper
Nagasa [length of blade]: 27.4cm