Hello Johan,
Yes, the hilt of your kris seems to be made from kemuning, and the gandar (stem) possibly from angsana (pterocarpus indicus). See the Malay Art Gallery site for reference.
Regarding the number of luks, I agree with what David said, the maximum number of luks for standard Javanese dapurs is 13 (not 7), and the Bugis seem to favor the blades with either 7 or 9 luks. The blades with more than 13 luks are called kalawija.
Regards
