Africans or dayak bronze hilted swords ?

[Ian]

Originally Posted by Marius66

There is a deep black side and a ''brighter''-""metallic'' on the sharp edge side of the blade without guard.
Is that what you call a '' heat quenched edge'' ?

Kind regards

It could be. Your latest pictures seem to show differential hardening but etching would likely bring it out better. Heat and then quenching with oil or water will create a different crystalline structure and harder edge, which shows as a line along the edge that is a different color from the rest of the blade.