Not sure this will be of any help but-- I have a S&W issued parts book, that is to sayit contains pages showing their guns, up to the late 70's or so, nothing in the last 20 years or so. It lists the gun, part numbers and a description of the part-- firing pin rear sight blade, etc., you get the idea. If it would be of any help, I would be glad to copy the desired page needed and send it to you-- the govt. can go do you know what to it's self. I could care less. PM me if need be. I have considered selling the book but am not ready to do that as of right now. FYI---