I too Ian, my kris that once belonged to Datu Piang that has a solid suassa hilt (with solid yellow gold accents) was once black! I thought it was silver until I polished it and found the solid suassa.
What I base my leanings on the metal is the type of hue in its
cleaned state, which looks to have less gold and more silver. Ian I think this is more like samrit than suassa.
Either way, it is a nice piece!