I can't tell for sure something about the origin from your's and mine but when you have a look to Albert's book at page 27 there the badiks with similar elongated handles are described as Java origin but with "?".
And want to remember this thread:
http://www.vikingsword.com/vb/showth...ighlight=badik
So I can understand the question from Alan. On the other hand, the examples in the book and from Ganjawulung have all a very similar handle form what let think that this form is typical for Java badiks.
Regards,
Detlef