The only practical plus for this "original" model vaquero is that the large frame can handle "Ruger/TC only" loads. Some of the folks like that. The CCH is the chemical type, and it will fade some. Ruger did not use Bone-Charcoal on any of their guns. Talo and other distributors have a couple of "real" CCH done by Turnbull, like the Super Blackhawk from last year.
Nice gun, and that being said it's worth $450 or more.