The blade was polished.
Blade length : 60.9cm or 23.98inches.
Sori : 1.8cm or inches.
Width at the hamachi : 3.05cm or 0.7inches.
Width at the Kissaki : 2.22cm or 0.87inches.
Kasane : 0.69cm or 0.27inches.
Era : Showa period.
Shape : It is wide and thick nice sori
Jitetsu :KOitame hada well grained. It is in plain muji style
Hamon : NIe structure gunome midare line with ashi and sunagashi
activities in the the ha. The hamon is in swirl. Boshi is hakikake style.
Special feature : This piece is mumei however, from the structure,
it is most likely Showa sword.
The swirl in the ha reminds of Naotane piece.
Historical background: During WWⅡ
Koshirae : Navy Gunto Koshirae
Aoi Art estimation paper : whole Oshigata.
Price : 300,000 JPY- (including shipping and 100% insurance fee)