Darfia Copper Alloy question

[Gavin Nugent]

Thanks guys,

I deliberately left Suassa out of my initial comments knowing it is found on some of my Sumatran pieces and has the typical gold/copper hue... this piece pre dates them by about 150 years, is from Another region and has a copper/ silver hue.
Do the Dhafia purists refer to this sheath covering as Suassa? By another name?? Or is the term for this alloy unknown?

Gav