Hamon Type?

[Dick Tait]

Recently bought this mumei wakazashi (nagasa = 18" or 45.5cms and the sori = 5/8" or 1.5cms):

The hamon is nioi-deki and has a series of these "double hills" along the length (and some nioi-kuzure):

Would this be regarded as "koshi-no-hiraita" or just "irregular gunome midare"?

I'm thinking Bizen-Den, but not sure which period. My hunch is Muromachi - but not that confident!

[cabowen]

looks more like a plain midare to me.....I see no gunome....

[Jean]

Notare midare

[Dick Tait]

Thanks. I've not seen/handled enough swords to discern the differences yet!

 

Perhaps this photo shows better what I was referring to - this shape/feature repeats along the length of the blade.

 

[cabowen]

gunome are humps....like this:

 

[David Flynn]

Mino?

[uwe]

More Bizen I think. Touch of "crab claw" and the nakago looks bizen'ish (IMHO) :|

Cheers

Uwe

[Dick Tait]

This picture matches closely what I was trying to describe as a series of "double hills", like the hamon on my wakizashi:

This was described as koto-bizen in this post.

Can this type of hamon be narrowed down further to a particular period/school (oei/eikyo/sue), or is it fairly generic to bizen-den?

Thanks!