Dave B,
The touch mark is pressed in soft brass and then inlaid into the wood. I do the same thing on horns. (The press and tools are the ones I posted in the "tools" section.
The Kauri wood does indeed come from New Zealand. The trees were buried in a bog 50,000 years ago and are now being "mined" for their timber. Too soft for gunstocks, but it is good for horn plugs, bullet boards, and I have done some light wood inlay with it.