Solo keris for comment.

[David]

Thanks for the clarifications Alan. Yes, my first impression of the second photo was that it reminded me of the Bugis form, but i didn't want to comment on an image that i found hard to decipher like that.
Do we have any photographic evidence of early Jawa/Bali/Madura sheaths that might exist in European collections that were gathered in late Mojophahit times? Off the top of my head the oldest sheath i can recall seeing from this area (and i am not sure that it's exact origins have ever been determined, is it Bali or Jawa?) is the "Sendai keris" which we can at least date to somewhere around 1600 or perhaps a bit earlier. That sheath has some similarities to what we consider walikat while also displaying flourishes of the more formal ladrangan form on the front side.
Unfortunately most sheaths of such antiquity have not survived over time.