ETHNO KNIFE - ORIGIN UNKNOWN

[fernando]

I need help on this one.
The sellers in street fairs are mostly not trustable when it comes to pieces provenances. I was told this is from Papua New Guinea. Is this any plausible ?
The blade doesn't look of very high quality, neither very old. The grips are in a natural material, could be horn. The binding is brass wire, and the collar is moulded with thin leather. The sheath is in very thin wood, covered with leather, stitched in one side, fully decorated with tiny superficial efects, having some aplications in straw ( so it looks ). The 12 inch blade is single edged and has a fake fuller in each side.
The hanging device is very particular, with part missing.
Any coments on this weapon's provenance would be so much wellcome.
fernando