Showa stamp on type 98?

[Corry]

All, Any idea what this stamp means:

 

 

[BANGBANGSAN]

大正？

[Bruce Pennington]

Trystan, you're killin' me!  You're determined to make me learn Japanese aren't you?! Ha! 

 

So: 大正 Taisho 1912

 

So could be a date?  Could we see a broader photo of the nakaga where it sits?  It would give more perspective as to it's possible purpose/meaning.

[Corry]

It's actually off of this sword:

 

 

[Bruce Pennington]

Ok, maybe it's my browser, but many of the photos, including those of the nakago, are gone or not viewable anymore.

[Corry]

[Corry]

 Bruce,

 Will those work?

[Corry]

Here is the location:

 

 

[Corry]

I don't think it's a date b/c it's too early for this smith. As I understand this is the showa smith Yoshichika. Not, the famous one.

[Bruce Pennington]

Right, and I have many mysterious stamps like this at the end of nakago of unknown meaning or origin.  They could be a shop or forge logo. Someone proposed it was the polishers logo. I don’t have enough of them to pin any of them down to a particular smith or area shop.