I use 154CM for that blade at 59Rc and cryo tempered. With or without a butt cap.
The Randall shown is stainless blade and nickle silver guard with walrus tusk core ivory stick.
Tim
I have one of Tim's knives in this pattern. Suffice it to say, they are top-shelf. If you haven't had the chance to get one from him, then you are missing out.