 It was the second all stainless steel revolver made by Smith & Wesson, the first being the Smith & Wesson Model 60.It was widely used by several U.S. police, sheriff and state agencies and was a popular choice in high humidity states because the stainless model 64 was more corrosion and rust resistant than the blued Model 10.Originally offered in two variants, a 4" taper barrelled square butt or a 2" round butt, the Model 64 has since been offered in numerous configurations.