Tam, when was the tarnsition from forgings to MIM? Got a date or S/N marker?
It varied from model to model and even part to part (the 65 went to a MIM trigger in '97 and then all-MIM lockwork in '98 with the -6 variation,) but it's easy to tell at a glance: If the firing pin is on the hammer, where God and Dan'l B. Wesson meant for it to be, it's pre-MIM.