Thanks, number under 'Spec Order' is 1032. Which according to your advice would give it a birth date of 1991? With the letter dated Dec 5, 1990. Do you know if this being an evaluation firearm gives it anything more than a little interest? I have had this firearm well over ten years and never scrutinized the box contents! It also came with two boxes of Federal Red box 9mm+P+ ammo marked 'FOR LAW ENFORCEMENT USE ONLY' Very hot stuff. Wrote S&W recently as to the adviseability of using this ammunition and they recommended against it. All very interesting as this was the dept issue ammo that my Pa was issued at the time.