Well, i could stick my neck out Michael, but it wouldn't really mean much since i don't really know very much.
I will say that the mendak appears to be an old (not too old, but certainly not new) lung wideng type which i believe (at least according to Solyom) would be a Surakarta form. I am not sure if such a mendak could be properly used on a Madurese keris. The hilt, of course, is not Surakarta, and since Naga Sasra believes that this blade was adapted to this sheath it would seem we have a bit of a mix 'n' match here. The blade looks more Javanese than Madurese to me, but i don't really have anything to back that up with, just a gut instinct.
