Hello Jean,
You beat me to it! Seems we agree pretty much. 
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				The dapur of the blade looks Javanese but it may rather be from Palembang for the following reasons: 
. The blade looks rather short, less than 35 cm? 
. Pamor keleng 
. Shape of the greneng, jenggot, twin lambe gajah, and gonjo (top view). 
. The fitting of the blade into the scabbard is so neat that it looks original.
			
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 Palembang blades of this style can be very small to really large.
Pamor keleng is also not unheard of with keris Jawa that focus on garap; thus, I'd prefer to leave pamor out of the equation.
Yup, most Palembang blades seem to approach gonjo of nyirah cecak style. (Except for those keris Palembang which are obviously Bugis-influenced or based on Sumatran styles, pretty much all prabot details seem to be borrowed from keris Jawa or keris Sunda.)
Yes, the crosspiece fit seems original; however, it could have been crafted for an imported blade, too.
Regards,
Kai