Dear Spunjer,
IMHO, you have a nice older blade, with a nice pamor pattern Balinese called 'Tambangan' (tambang=rope). I've heard that this pattern is a favourite one especially in Bali/Lombok area while in Java, many Javanese would avoid it since it look likes the 'Buntel Mayit' pattern, not a good one. But yours isn't Buntel Mayit since it has a steel core. I believe it would look more beautiful if you etch it properly. Good Luck!
Dear Rick,
I don't know for sure that this sword is exclusively used by Sasak people. I didn't ask the dealer for detail, while some of them, in fact, were Sasak Men. Well, too busy and dizzy watching (and sorting
) the blades. Sorry.
Best Regards,
Boedhi Adhitya