Hm, I'm not sure what caused these but IMHO it screams power tools (seems like this was done after the hilt and clamps were already fitted - maybe just a really bad cleaning/polishing job?). It certainly isn't something I've ever seen with an antique Moro kris.
Your blade has been grinded into shape (luk and gangya features formed by stock removal). In the traditional approach a blade would be forged into shape and would only need minor work to remove scale and to smooth the surface. Detailed work at the base of the blade would be done by specialized tools (including small files, I suppose) and then the blade would be ready for the final polishing steps.
Regards,
Kai
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