Ok, after viewing them all four side by side I have to say that the hilt in question isn't so much "erected" like the three others but when I have to give an opinion about it's origin I still would guess Jambi but I don't want to put my hand in fire for my guess!
At last only the carver could give a certain answer if it is Jambi in origin but I doubt that we can ask him.
Regards,
Detlef