Thanks very much, Mike and Fanglekai. :thumbup:
Lambertiana - That's a very good question, my friend. When I first uncovered these fragments of cutlery history, that was one of the first things I pondered over too.
Firstly, I think it's safe to say that sambar stag is an extremely tough, durable material - Herder touched on this point too. Some of the heavily deteriorated scales, I would guess were actually bone.
As far as the timber covers: I would hazard a guess - and it's only a guess, mind you - that they're Ebony. Given that in old catalogues of the past, African Blackwood was never mentioned as a specific hafting material although it was undoubtedly traded and used, I would further conjecture that 'Ebony' may well have been a catchall term for both Dalbergia Melanoxylon ('African Blackwood') and the Diospyros ('Ebony') genus of timbers. Apparently African Blackwood is actually more likely to have been the Ebony of biblical times than the Diospyros woods we now know by that name.
Some of the archeological and government material regarding these wrecks refers to the wreck sites as having undergone the equivalent of decades of a tumbling washing machine cycle, with sand and flint core reef fragments thrown into the abrasive mix.
Whatever the case, Herder and Lambertiana: one piece of certain knowledge I have taken from this jaunt, is that Sambar Stag antler, Ebony, Blackwood, and possibly Cocobolo (although I think that may have been more common on US made cutlery, I could be wrong though) are mighty durable hafting materials which I now have absolutely no doubts about whatsoever.
This website has a lot of great reference material on exotic timbers, for those interested.
http://www.wood-database.com/wood-articles/top-ten-hardest-woods/