S&W Special Feature Code Meaning

by bj , Saturday, March 16, 2019, 19:42 (2079 days ago) @ Remington40x

I don't know about 15-6 but model 15 was traditionally carbon steel- blued or I presume could be nickel. (Model 67 was the similar gun in stainless steel.) So if it is in fact stainless then that might be what the special code means.