Minang Keris with mixed influences?

[A. G. Maisey]

Here are two images of Si Ginjei.

I apologise for the quality, they are scanned images.

This historic keris was supposedly made by Empu Kinom, and is a Mataram Sultan Agung keris.

It was gifted to the Sultan of Jambi, so we can assume the wrongko and handle are representative of old Jambi style.

I have seen old keris attributed to Palembang that had dress so similar to this that I could not distinguish any material difference.