G'day VVV,
I had attached a picture of the cup assembly. The screw is strange, it is not solid, it has some kind of resin in it. I don't know why they would do this whole complicated things when they can just cast the entire hilt like other hilts. (Is it? Sorry for my ignorance) Probably to fix the blade?
I think actually everybody used to manufacture this sort of sword. Since there's a lot of similarity, we can't really say which is which..