Gentleman, is it beyond reason to believe that a post WWII kris could be crafted WITH a separate gangya? Sure, it's probably a rare occurrence, but then so is a pre-WWII kris with pointy luks. Another clue might be found in the metal itself. Is this laminated or mono steel? I'm fairly certain that is just design work and that this is not a twisted core. Can't really see any definite lines of lamination throughout either. If it is mono steel AND has pointy luks i would be more inclined to a later dating.
