When I look to Chregu's hilt I think that it isn't new carved and have a good age and have a other colour like the many new/recent geraham hilts and wrongkos and in my opinion it's possible that this ensemble is long together like this.
In this matter I want remember to my own Sumatra keris which I have shown at this place some time ago. I think that the hilt of my keris is a good sample of a well crafted geraham hilt. And I believe that my example also have a age pre WWI.
http://www.vikingsword.com/vb/showthread.php?t=8761
Regards,
Detlef