"CV" was/is 1095 modified with a small amount of chromium; not enough chromium to make it stainless though.
"CS" is "normal" 1095.
CASE offers fewer
patterns with CV/CS blades.
As far as I know,
ALL of their patterns can be had with "True Sharp" 420HC blades. Only a limited number have a CV/CS option.
If
not "in the vault"

and is in production, is the "Copperhead", their 2 blade slipjoint folding hunter, and single blade clasp knife folding hunter, or the "Shark"(?) lock back, (their entry in the Buck 110/112 market), Moose, large or small Swell Center/Coke Bottle, available with carbon steel blades?
"When"/"IF" Case takes a pattern "out of the vault" such as the standard Barlow (how many decades has it been since Case produced a 5" closed Daddy Barlow? 4? 5? D'yah "think" Mr. Daddy Barlow will
ever be produced by Case again?)
Is CV/CS an option?
A couple years ago when the mini/small swell center was "taken out of the vault" and produced for a year, "True Sharp" was the only blade option.
If/When the standard Barlow; single or twin blade is produced, are any not stainless?
When people say "I wish Case would use more CV/CS/carbon steel ..."
I take it as: "I wish Case would offer more
patterns with
not stainless carbon steel blades."