Re: S&W Mod 411
First clue, it was only manufactured from 1992 to 1996, so that puts it into a 4 year time frame. Second clue, S&W used the pre-fix ( on auto pistols ) TZU in 1993 through VAM in in 1994. So my guess would be 1994. It is a modern handgun, do you need the date of manufacture for registration ??? It doesn't effect the value in any way.