Tachi signed sadatsugu

[Vagabond]

Hello everybody, i would like kindly ask you if you can help me with this tachi i have. It is signed sadatsugu, but which one? I believe this tachi is koto/ muromachi. But not sure. What school you think belongs ( i have the idea is yamato) and which sadatsugu? 
the sword is huge but light and balanced at the same time.

 

total lenght 103 cm

nagasa  79,4cm

sori 1,5 cm 

kissaki 3,4 cm 

nagako 23,1 cm 

motohaba 3,1 cm 

Mune 0,5 cm

mune yokote 0,3 cm

weight 826 grams

[Vagabond]

[Vagabond]

[Vagabond]

[Vagabond]

[Vagabond]

[Vagabond]

[Vagabond]

No one is able to help me?

[DirkO]

There's actually a number of smiths who signed 貞次. It's a nice, very good sized piece. My guess would be Momoyama or even later. It has a elongated kissaki, high shinogi, some masame and shows attractive activities  - which narrows it down a bit, but not by much.  I think your best bet would be Massimo Rossi in Rome to have an in hand appraisal. He can also tell you about a possible polish. I think it would look stunning, but could be I'm overlooking things not shown in the pictures. Sorry I can't be of more help.

 

 

[Vagabond]

Thanks a lot Dirko for your comment and advice. 

[Alex A]

Hello, just picking up on a few points Dirk mentioned and without spending much time at all on it

 

Look at all the details and try work it out.

 

Some similar points. Itame, masame, high shinogi

 

Dropped a page in. Not saying it is or anything, just how you need to go about it

 

Ps, always a possibility of gimei !