Any of the "Classic" series WITHOUT the dadburn infernal eyesore of the IL!
Model 616 in 327 Magnum.
I might be repeating the reply I made then. S&W did make an aluminum/scandium K frame with a blackened stainless .38 Special cylinder, the Model 315 Night Guard. While the frame was machined for adjustable sights the revolver shipped with large fixed rear and big tritium bead front sights. Very few sold.I mentioned this a few years ago in the Wishlist subforum, but I always thought it'd be cool if S&W would bring back the Model 12 as a scandium-framed/stainless steel model.
A 610, unfluted cylinder, NO lock.