Well (being a deep subject and all
) this is from Pampangas and called a tabak. I think it is perhaps from the turn of the century and not WWII. Many of these were picked up as souvenirs off of dead Filipino "insurgents" by Americans in the Philippine-American War. Not easy to have the scabbard with it, much less in good condition. The pommel is horn and the ferrule seems brass? Nice piece. I like these.