Only way to figure it out is to request a letter from Roy Jinks, Mine was all original with the exception of the Red front sight insert which was done after.
Nice I just got a 19-3 nickel snub w/ SN 5K940xx. It has the RR & WO blued rear sight, and recessed cylinder. Also has the trigger stop and is perfect shape.
What is the protrusion behind the trigger on my 19-3 ?
My 19 -7 doesn't have this protrusion. I have seen similar things on other revolvers.prior to my post.
I just noticed another post referring to a trigger stop. That was my best guess