A keraton (?) keris in east javanese dress, where is the blade from?

[David]

Gustav, thanks for the additional images and your ideas on this fluted trunk. I can also see this theme to a certain extent in this East Jawa hilt in Jean's hilt book.
Regarding the wrongko, while this blade may well have been adapted to this sheath i must say that i would have expected a different fit to accommodate the gonjo wilut of this blade. It rides a bit too high in the wrongko. But i will say than none of the images i have seen are really satisfactory enough to draw an firm opinion.