The S&W model 17 was available as a 6 shot or 10 shot revolver.
They also have the model 617, in 6 or 10 shot. The 617 is the same as a model 17, except it is in stainless steel.
I don't recall any 12 shot revolvers.
They also have the model 617, in 6 or 10 shot. The 617 is the same as a model 17, except it is in stainless steel.
I don't recall any 12 shot revolvers.