The hilt look Maduran to me, in the Donoriko form.. the hilt cup Sumatran.. the blade, Bugis Sumatran, imho opinion. Lovely thick and wide blade with nice pamor works.
BluErf's wide cross-piece sheath would look elegant for this blade..
http://www.vikingsword.com/vb/showthread.php?t=4732
or
John's sheath type..
http://johnylhan.multiply.com/photos...ion_1#photo=23