Beladau

The beladau is a long curved dagger from Sumatra and Borneo. It is usually single-edged, though double-edged variants exist.

Originals:
 * http://www.ashokaarts.com/shop/rare-dagger-from-borneo-beladau-banjarmasin-19th-century (handle only) Banjarmasin, South Kalimantan, Indonesia