Hi zartane,
A nice piece you've got there.
Your is a Tajong. There are luk piece, as well. [
See example ], (courtesy of Malay Art Gallery).
Tajong got its name of the distinctive scabbard crosspiece (sampir) "which resembled the uplifted, winged shape of a Pattani fishing vessel of that name." (ref: Spirit of Wood).
A good resource by Dave Henkel:
The Tajong: Keris of the North Peninsular Malays .