A Very Interesting Philippine Weapon

[drac2k]

Well, interesting to me anyway. I think that this Philippine dagger was picked up by a US soldier and converted into a "D Guard," knife. Thank God that it was dated or it would probably have been listed as an American Civil War Confederate Dagger. It is also named F.A. NENSTIEHL which I am guessing isn't a Philippine name. The knife measures 17" long.
Any comments would be welcomed.