Koshirae

[dimitri]

Good evening everyone, I would like to have some clarification on this translation for a koshirae, I do not want to get ahead of myself but it seems to me that it is a handashi koshirae but I am satisfied with my purchase.
Sincerely 
Dimitri.

For the last photo I have a doubt of common sense, sorry in advance.
THANKS

[uwe]

As a first step!

The fuchi is signed “幸雲斎古川” (Kōunsai Kogawa + kao). Another reading for Kogawa is Furukawa or Kosen…

[dimitri]

I thank you very much, I cannot find a historical correspondence.  
You saw, there are annotations in pencil on the document which have been added, I tried to have it translated but I have as many translations as I have translators.