Holy Cow. Have not heard that name in years. Had one back in the late 80's. Very well made knife. Stag handle and about a 7" blade. I was young, stupid and broke the tip.
But no idea of the steel type.
Rade used a lot of D2 early on, but also used several different stainless steels as well. Rade made some fine knives. Knew him for several years. His wife is still doing shows - kids and friends run it mostly. Might try contacting them and see if they know for sure. They'll need a pic or two as I don't remember him stamping any kind of model number on his blades.