np! nah, I don't absolutely need to know, even if it's of the O kind it's plenty strong, and actually stronger (less hard) then the T4 or T6! It's probably just that and the best choice as a handle material.
Just got mine in the mail this evening and I love it! Even though it would be cool to have a upgraded steel, say like something a little more stainless like VG10, you guys produce top notch designs with a superb QC!
Keep em coming!!!