Tsuka writing. A long shot…

[Scogg]

I understand this one might not be legible… Even if getting a translation is a long shot, I figure it can’t hurt to try.
 

It’s very small, and located on a type 98 gunto tsuka. 

Sincerely,

-Sam
 

 

[uwe]

Right side looks like “十五号”. Can’t make out the second character, marked in red…

[Bugyotsuji]

Maybe X-西 (Nishi) on the left?

Can’t work out the first character…

[Scogg]

Thank you Piers and Uwe! Much appreciated.

While I still cannot make sense of it, it's interesting nonetheless! And good to know.

Speculation: Maybe some kind of assembly system for the fittings, like i've seen on some other gunto 

Sincerely,

-Sam

[kissakai]

If it was for assy I'd expect just a number

 

[uwe]

Right side we have “10” “?” and “gou” (号 = number, edition, make, model, issue, part of that group)…So it can well be for assembly?!

[PNSSHOGUN]

These are usually numbers, type of mon, Tsuka Ito style, or owners surname.  

[Bruce Pennington]

The 10 5 in kanji on the right match the 10 (>) 5 (\) in modified Roman numerals on the left.  All I can say.

[Scogg]

Those hash marks, the modified Roman numerals, are repeated on the seppa and tsuba. I had figured those to be the “assembly numbers”, and was hoping for a surname in the writing. 

 

Thank you everyone for the input! This is turning out to be an interesting gunto.

Sincerely,

-Sam