Five-shot J-frame revolver in .38 Special with adjustable sights. Chiefs Special Target models were introduced in 1955 before S&W began numbering its revolver models in approximately 1957 (see listing for Model 36 Chiefs Special Target). In 1962, the factory began calling this configuration the Model 50, but production guns were still stamped Model 36 until about 1973 when the model marking was changed to Model 50. However, some production runs of Chiefs Special Target Models continued to be marked Model 36, including batches in 1973, 1975 (213 3” heavy barrel Model 36-1s), 1976 (three 2” nickel models), and 1989 (2,000 satin blue 3” full-lug Model 36-6s).