What is this?

[katana]

I noticed on the listing pictures the pommel has two holes 180 degrees apart. It suggests to me that a pronged tool tool was used to tighten it.....further suggesting that the tang is threaded and why, perhaps the guard is the wrong way round (if it is indeed incorrect)...wrongly re-assembled? The hilt components have gaps and seem 'slack' perhaps a few are missing
Interesting dagger never the less