According to style of the silver work, some collectors in my area ID this piece as a "Rakhine" 's Dha. They are usually "Dha" size. Although many of them has curve, cut-off tip like this... one can also find other tip styles from this area.
Having false edge upto 1/2 or 2/3 's not uncommon.
We are now discussing about possibility that the peice was used by an elephant rider.