thanks for your comments
it is difficult to capture the "thumbprints" in a picture, (in the red circles)
maybay you can see it better on the picture taken of the side.
The medak cames with te keris, and because I never seen this form before I doubt about it in the first place if it was a real mendak.
But the cup-shape fits good on the hilt, so in my opinion maybe a local artist has given his own inspiration on this one.