Strange engraved Keris blade.

[Athanase]

Hello everybody, I'm just joined the forum.
(Sorry for my english, I'm French).
I'm thirty years old and I collect keris and other Indonesian weapons.

I read this forum for a long time but I decided to join you because I recently bought a very original (antique?) keris.

The warangka is made of a single piece of wood with a pendok in copper alloys.
The mendak seems to be as old as the scabbard and handle.

It's difficult to see the pamor. the pamor draws parallel lines over the entire length of the blade.
The blade is engraved with an elephant ridden by a mahout, a little house and other characters. Both sides of the blade have the same engravings, but the other side is less clear and too complicated to make a picture.

I searched a bit on the internet and I've never seen a similar keris.
I would like to know the name and symbol of this type of blade.
What is the age of the engravings on the blade?

Thank you very much.