Gboy is a knowledgable chap and certainly gets around, however, based on what i've seen, the 'crown of cambodia' on an island close to Mindanao.
Here are some stone markers recovered from the hole we've dug there... one is a perfectly carved life-sized stone gun and the other a carved crown of the same material, the last sign discovered was a pregnant female stone statue.... this site was discovered via a stone map along the footpath heading up the mountain, the same map was again found on a larger stone buried w/in the tunnel.
From research of this area, it IS Cambodian, but may not pertain to the crown mentioned in this post. food for thought
P