Made this one last year but it had issues so it's been in my drawer. It's 4mm o1. Brown mallee burr with black liners. Leather sheath made for it by Stewart Lite. It's a great looking knife but my makers mark caught and put a small line it as shown and there's a couple of bits I'm not happy with. It's not perfect but still up to the job!! I can't be more honest than that so looking for £85.