Thanks for sharing this interesting kris.
In other Muslim areas this motif would be an eyelash, a symbol to avert the evil eye.
I haven't seen it in this combination before but 5 (in your eyes) is the corresponding number for this purpose.
Yours has very nice pamor-like laminations. Usually the ones of this size has twistcore, according
to this old thread with several reference small sized kris.
http://www.vikingsword.com/vb/showthread.php?t=5834
My guess is late 18th C.
Michael