Agreed Rick. Very unusual dhapur, though i wouldn't think Borneo would be an option here.
The dress is Jawa Solo as you point out and i also think the mendak looks Madurese.
Kisak, keris have an unusual lean to them. I don't think the tang has been bent here. The ring (mendak) does not look as if it has been stuck to me, just bent somewhat with age.
All in all i like this keris. It will be interesting to see what others have to say.
