Hello Tom, I'm not sure what is going on but this is about the third time that you have posted a reply to one of my threads that did not show up for over twenty-four hours.
I haven't seen this style in any great number (though I have seen a couple with the triangular blade) and that was why I ask if it was one of the rarer blade styles. I do however have one other with the "slight forward curve to the blade" and it is also of a diamond cross section. I have on the other hand seen quite a few Philippine daggers with this blade style (as well as the other two styles you have mentioned) but they all have had Spanish influenced hilts. Thank you for your help.
Robert