To be honest I really don't know what the meaning is of those symbols on the keris. Ricks remark is a posibility. I've seen such a keris in good condition in a very serious collection. I was even allowed to keep it in my hands. The only thing I could do at that moment was to put up a face like this,
and enjoying a marvelous keris.
I always thought that such a keris was made for a wealthy person who could afford a keris with gold ornaments. The keris I mentioned had a dress of gold and ivory, that is pointing in such a direction. Symbols of power and strength, reflecting the position of the owner.