It's an interesting theory Barry, but i'm not sure if it flies. AFAIK, junggayan ivory hilts were a matter of prestige and wealth and would probably only be found on datu level kris. I think most of those guys had others do there fighting and that these kris, no matter how formitable, probably saw little actual combat.
Oh, and since you have about 10 yrs. on me, please feel free to pass your treasures on to me. I promise i will take very good care of it.