Hello Ganja,
this could be Peninsula keris as well, look here:
http://www.vikingsword.com/vb/showth...ight=peninsula
The "temu ure" are the small black dots along a line which are normally typical for hippo ivory which I think to see at your both hilts as well so I think that it isn't ivory from dugong but from hippo.
Others with more knowledge than I am will be able to tell you more about the origin of this both nice keris. Do they have both a sarung? Can you post pictures when they are inside?
Regards,
Detlef