Tachi in Shirasaya
Signature : Yasutsuna
(Not guarantee signature)
The blade was polished.
Habaki : Silver Single Foiled Habaki
Blade length : 66.8 cm or 26.3 inches.
Sori : 2.3 cm or 0.91 inches.
Mekugi : 3
Width at the hamachi : 2.57 cm or 1.01 inches.
Width at the Kissaki : 1.74 cm or 0.69 inches.
Kasane : 0.61 cm or 0.24 inches.
Era : Mid Muromachi Period.
Shape : It is O-Suriage Mumeri with regular width and thickness.
It is nice shape katana.
Jitetsu : Koitame hada well grained with jinie attached.
There is clear Utsuri appearing.
Hamon : Nie structure suguha with some notare hamon.
It is Ko-Gunome midare with round Boshi.
Special feature : There is a signature Yasutsuna however, the signature is questionable.
There are some rough area on the ji.
It is nice shape katana. The sword looks Nanbokucho period.
Aoi Art estimation paper : whole Oshigata.