In the hope of exploring this thread and other unrecognised Borneo weapons. I ask just as a start. Mandau collectors please join in. I have had Mandaus with similar
style engraving. Look at the midle Mandau in this link posted by Lee. We see the same form to the decorative plan. What we really need is better pictures from Richmond and more contributions.
http://www.vikingsword.com/vb/showthread.php?t=14971