I also had believed that this pedang came from Sumatera, but since I saw this pedang brought by local dealers from Lombok island while I was on keris exhibition in Bali last year, I was 'forced' to believe that this blade came from Lombok, not Sumatera. They brought nearly a sackful of this pedang, and some of them in newly made fitting with old blades. Even some relatively new, non-madura blade exist. The local dealer's 'hunting ground' is exclusively Lombok, and since Bali and Lombok is a nearby neighbouring islands, I saw them kept bringing freshly acquaired stuff nearly everyday, and made my 'keris fever' coming again.
The Lombok origins, perhaps, may explain the 'makara' look-like handle
best regards,
Boedhi Adhitya