Your knife is a 2003 Case medium stockman as oldergogs1 stated.
The CV stands for Chrome Vanadium, The SS stands for Stainless steel or surgical steel, a bit strange to have a knife with mixed steel blades, that is SS and CV, I think.
Maybe the fact that the spay blade is SS for veterinary work. That's a new on on me. Hopefully some one will come by that has the answer.
What I wrote concerning mixed steels is still true but I just realized the SS blade is on a different knife. I need to pay closer attention, sorry.