As a swordsmith with extensive forgewelding experience who has shared shop space with welders and architectural blacksmiths, I’d have to say the discontinuity in the metal of this blade appears to be completely consistent with an arc/gas weld done long after the forging of the blade.
It would be impossible to get the metal to look that way via a forge welding process.
That’s what the photos are saying, but of course I defer judgment to those who can see the actual sword.
