I have a 5-1/2" Redhawk. Looking at it, it doesn't appear to have a safety manual inscribed on the side of the barrel. It also doesn't appear to have been scrubbed off. It's a 1993 gun. When did they start putting the billboard on the side of the barrel? What's it worth? Prefix is 502-then there is 4 digets, BUT it appears there is a fifth diget on the rounded part of the grip and you can barely make out a number. It's off center. What I'm saying is worst case it's a 1993.