I called S&W and found out my 3913 was made May 8, 2000 and shipped a month later to the Maine State Prison for a guard to use.

How cool is that???

My 4513TSW is almost 3 years older (8-7-97) and has a MIM hammer. I wonder if the Maine State Prison ordered my 3913 with a forged hammer?

This gun family tree thing can be addicting too!