As no one has yet done so, might I politely suggest the 'Sinhalese sceptre' is actually the butt half of a rather nice Indian Lance.
I confess i am embarrassed. Not that i made it myself that this is a whole sceptre lance, as i am quoting the text of a 1989 auction catalogue. Given that this is the lower half of a lance, all i can do is invert the picture ... and appologise for the mislead .