Oh Smashy, i'll bet you've got a few more pressing skeletons hanging around in your closet to haunt you than battery acid.
Sorry Mike, but i think i disagree with you here on many fronts. IMO this is not the same blade form at all to the example you posted. It does resemble other cundiks i have seen, but i don't know enough about this form to know if this is truly one. I don't think this was ever intended as a slashing weapon either. I think it's origin probably is Lombok or Bali as the blade work looks very much like other weapons from that area. I also don't think this is an executioners weapon. How long is it anyway. The bloodless means of execution you mention Mike requires a fairly long blade.
Rick, i see what you mean by suggesting it may be a reformed keris, especially having a pecetan and all, but my gut feeling is that this is the blade's original form, tip and all.