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With information from SC of S&W III. First two digits are caliber, except for the 39XX, 59XX, and 69XX that are all 9MM and kind of the 35XX that is the .356TSW.
Third number is type of model. 6 is for nonstandard barrel length, ie, 4 1/4. Fourth number is 6, for stainless frame and slide.
Third number is type of model. 6 is for nonstandard barrel length, ie, 4 1/4. Fourth number is 6, for stainless frame and slide.
