The following information came straight from Mike Stewart emailed to me personally. I've always held on to it.
"CV--Chorme Vanadium Steel used by Case for many years and Carbon V are the very same steel.
It is 0170-6 cutlery Steel...It was developed in the 1950's by sharon Steel specifically for Knives.
It is an enhanced 1095. They added Nickel--Chromium and a trace of Vanadium. it was a patented steel of Sharon.
Everybody used it. it was called by cute names by some companies --Chrome-Vanadium by others.
This was the original Steel chosen by both Lynn Thomson for his Trailmaster and Mike Stewart for the Old Mamba. Everyone used it until 1988.
Sharon Steel went Bankrupt in 1988. No mill would duplicate the steel because the patent was still in effect.
For a time everyone switched to other steels.
A few years back Case and Camillus found a mill that would duplicate the Chemistry of the old CV steel and they ordered a crap load of it.
Case had thier portion of the heat lot rolled to pocket knife sizes and Camillius had thier portion rolled to use for Lynn on his U.S. made knives and the Becker line.
This is an excellent cutlery steel and will out perform 1095."