Different Borneo sword

[asomotif]

Originally Posted by Indianajones

Roy, I happen to stumble upon this piece which has the similar features on the blade and indeed this piece I would also ascribe to the Iban of Sarawak, and than to the North of their region(close to the Murut region). See that this blade also lacks the 'concaveness'.

Best way to note concaveness is seeing both sides of the blade.
But this example from Ashoka arts is clearly concave imho.