Did I buy a Rencong?

[Conogre]

A couple of questions, if I may...does anyone know if these go through yearly ritual cleanings in Aceh, as in keris?
Second, in following the threads above, I noticed the phrase ".....given to visitors of the capital..."
Does this mean sold as tourist items or given as treasured gifts of rememberance to valued friends, such as are the small wing hilted knives on the Isle of Cete?
I have two, a very old ivory hilted piece with the blade nearly disintegrated from age and a second that looks to be only months old and yet still made with some care, although definitely an average piece or below.
Mike