More references, this one is in Spanish, click on the third knife "identified"( 2nd Philippine Knife)
http://www.etnics.es/identificadas.htm
Also found this older post by Leaf stating the possibility of shoulder usage.
http://www.vikingsword.com/ubb/Forum1/HTML/000665.html
Leaf
Senior Member posted 03-27-2003 21:18
There is currently a knife listed as a Sangi in a on line auction. It looks to be more recent then the one at the to of this tread. I have seen old pictures of Bagobo men that appear to be wearing these knives from their shoulders but the clairity is not there to be sure.