Mumei Very Long Wakizashi, with Very Active Hamon

Signature: O-suriage (mei or signature cut off).
Year Made:  Late Koto early Shinto
Forging Pattern: Hard to tell do to light scratches, itame possibly, 
Tempering Pattern: very active pointed gunome/midare in nie-deki.
Dimensions:  Blade Length:  23.31 inchesNakago: 5.5 inches 7 mm thick and 30 mm wide at Hamachi
Mountings:  Old shirasaya in decent condition, beautiful, gold foil habaki.
Overall Condition:  Good, sword is covered with light scratches and has some minor ware but has a very active hamon with much ji-nie which extends well into the shinogi ji on the turnback of the boshi (see photos with arrows). Beautiful hakikake boshi, this sword would be stunning in a full polish. Someone must have thought very highly of it, as gold foil habaki aren't and have never been inexpensive. It is also only a little more than a half inch shy of being katana length, so was probably cut down for use as a one handed back up sword by someone using a pole arm as their primary weapon. 
With masame hada visible in the shinogi-ji, the long turnback and pointed gunome hamon this sword reminds us of Sue-Seki work, very sharp and rugged swords sought after by Samurai during the warring states period.