Origin of the Jawa Demam hilt form

[David]

Thanks for the comments guys. I would rather not side track this conversation with blades. Let's keep the discussion focussed on hilt forms.
Sajen, i must admit that i just don't know the ivory source.I can usually recognize marine ivory, but i am afraid that distinguishing between hippo and elephant is not something i am very good at. I was going to ask you how you knew yours was hippo.