Dimasalang,
Very nice dagger! First one I've seen with a checkered grip.

Here is another knife that might be of interest to you. Median ridge on one side only (opposite side is flat) with only lower edge sharpened. Blade seems to be laminated but I have yet to try vinegar to bring it out. Brought back by American Serviceman Joseph Latterty and was supposedly captured during the Battle of Manila. The total length is 16-1/2 inches with a blade length of 12-3/4 inches. Sorry about the poor picture quality.
Robert