keris handle PANJANG

[KLUNGKLUNG]

Hello to e'body,

I have just purchased this Sumatran handle addressed to a Panjang keris. Still puzzled about the material, either bone or ivory. This type is quite rare and haven't come across many others.
Apart from my piece a very dark piece is attached with heavy wear and tear which is made of ivory for sure.
Lastly a printscreen attached from the Disk.

According Jensen ( information retrieved from his Disk) the provenance is the Karimunjawa islands but this information is not correct according others and more likely from the Karimun islands ( Riau islands).
The link to Durga is questionable too and maybe linked to a Raja? because of the crownlike topping. However the more common Tapah kuda shows a similar apex.

Any comment and / or start of sharing other Panjang handles welcome.