Hi
I actually in the end find out by myself what it is through a book. It is either a genuine or a copy of an early dynasty brass chariot sword. I guess it is a later re-make but then again you never know. I will take it to the Chinese palace museum to let them see if it is origical or a re-make, i guess a re-make but jsut a small chance it is original, that would make it over a thousand years old! But hardly likely. Still at least i know its function now