Nashi-ji or Konuka hada? Or just ko-itame

[JeanEB]

https://www.jauce.com/auction/x1188750321
 

saw this listing come up yesterday and I’m having a hard time figuring out what type of ji-hada the blade has. 
the sugata would suggest Shinto and konuka, but the osuriage and aging of the nakago would suggest an age older than konuka hada. 
please let me know if I’m overthinking this and should just call it ko-itame

 

thanks to all in advance

[eternal_newbie]

 

Some discussions in these threads about konuka vs. itame and nashiji. In the end, nakago shape and ageing can be altered to make blades look a different age than they are; sugata, hada and nie on the other hand are much harder to change without destroying the blade, so prioritize those first. Unless you're absolutely sure it's Hizen, itame/ko-itame is a safe bet.