The shandigan kris again
Perhaps a butt weld goes with shanidgization...............?..........
Any old kris sundang I've ever handled and examined in person seemed like san mai type lamination. Just saying......
That one closeup looks distinctly like faked pattern, but if so it lacks the usual mistakes that prove so, and it does seem to "run off" the edges of the center panel a bit, as real pattern might do.....I would mention that lam lines in the other part of the blade don't mean much as to faked/real pattern; most old blades with faked pattern are folded/laminated, just not interestingly/complexly.
Real interesting parrallelism to the premedieval and medieval German "Viking" swords (and spears; there was a panelled spear, although it was AFAIK made san-mai style, with overlayed, not thrulayed etched patterned panels.).