Hello,
After 2 days of effort (1 to remove the handle and the "selut" securely attached by mastic and "resin"? and 1 to re-drill the handle partially obstructed by glue / resin). Here is the Keris with a more correct mendak.
It's an old copper mendak with traces of silver plating. I had a brand new silver-plated mendak but the diameter of the Pesi was too wide....