Mandau hilt without decorations

[asomotif]

I recently bought this mandau with a very plain hilt.
The hilt looks original, the blade has copper inlays, the scabbard has some decorations and a well made carrying band.
On top of the hilt is a small hole and some resin where a tuft of hair was placed?

Are there other collectos with similar plain undecorated hilts ?
Any idea on age / origin amongst us ?

Thanks for any comments.
Willem