Material used for decoration, could it be mamas?

[milandro]

I was debating this with a friend about these decoration I have on a modern Bugis keris.


I recently visited a Dutch dealer who just got a shipment with at least a dozen of Bugis krises showing material with looked pretty much the same.


Now , I always thought it was embossed on a sheet of aluminum but both my friend and the dealer told me it was Mamas, although Mamas often shows a " golden" sheen .


Sorry about the quality of the images they are a cropped image