Hello,
Keris gonjo is made by cutting a piece of material from the blade forging, as shown in the video
posted here, so the gonjo should be of the same pattern-welded material as the blade.
If this forging method is also common to Malay pieces, then I would expect the twistcore gonjo to be fairly common to most twistcore sundang
I will be sure to may more attention to the gonjo from now on.
Emanuel