G'day Rusty. It is a custom Damascus knife made by renowned Knife maker David Brodziak of Albany, Western Australia.
Here are the specs and metallurgy:
David Brodziak Custom Hunter (made 1998; it was delivered to me personally by Dave)
Blade: All Stainless Damascus in raindrop pattern hardened to Rockwell 58.
Guard and Buttcap: 416 Stainless
Handle: Desert Myall (Goldfields, WA)
Here are a couple of photos of the actual knife: