I am also interested in this kind of blades with multiple sogokan/srawejan/kruwingan. As I understand some of them are attributed to Sumbawa (post #19 and #49 in this thread:
http://www.vikingsword.com/vb/showth...light=kalawija), yet it probably is possible, such blades are occuring in central Sumatra or even Peninsula.
By the way, it seems there is a possibility this blade is having pamor.
The sheath is Peninsular.