A couple of the nicer antique Winchesters in my itty bitty collection still have color casehardening on the lever & hammer. OTOH, my old (1897) 1886 in 40-65 left the factory with the receiver covered in casehardened colors, and there's not a trace of it left. I've been told by other, more knowledgeable collectors that the traditional color casehardened finish is not at all durable, and wears off rather quickly. That's one reason I'm so impressed when I see an '86 with mint, original casehardened finish on the receiver. Either it was never used or carried much, or someone handled it with kid gloves - literally. Doug Turnbull does casehardening for several high-end replica firearms makers, as well as restorations of antique firearms - I'd have to believe that he's a top authority on the process. Whatever, it's a beautiful, unique finish, and done correctly, adds a touch of traditional appearance. Power to you, LRI.