The knife with the horn handle is indeed most interesting and I remember an old thread: http://www.vikingsword.com/vb/showt...highlight=Luzon
And Ian is correct, the ferrule isn't what point to the Philippines but maybe Chinese or Vietnam like the base of the blade. This base style you can find by Chinese daggers. So maybe indeed Vietnam?
And please can you take a flash picture from the handle? (close up)