Gorgeous piece! Transitional/early Kris are my absolute favourite, especially the half-waved twistcores, and this is a piece definitely worth envy!
(Now I want one of my own even more

)
Does anyone know the regional origin of this piece? I've heard it being discussed as a Sulu piece on this forum, but I'm wondering what indicators are there that clue into it being from Sulu? (I'm wondering... is it the elephant mouth/trunk shape, and the thin/shallow fullers separating the twisted core from the outer edge steel?)
Conversely I could be completely wrong in my recollections and if so, where do pieces like this magnificent example hail from?