I think so, that your keris is Javanese origin. The scabbard like a very old style from East Java. Discontinued product for now. This keris seems like from Pajang period (about 16-17th century).
You can comparing the characteristic with this one :
http://kerisbudi.fotopic.net/c580201.html
Congratulation that you bought an old Javanese keris !!
Regards,
Manshur Hidayat