Fortcouragearmory
Member
I have a S&W 4566 and am trying to get as accurate a date on its manufacture or shipping. As my attachment shows, the serial number has a TYY prefix. I know the 4566 was made between 1991 and 1999. The Supica Book doesn't list the TYY prefix in the appendix, so at this point, I'm just guessing. Does anyone have any more accurate data on the 4566? Any help would be appreciated.