I brought home a 6 inch 19-4 today and have really enjoyed this whole thread. This one is in 98% or better, pinned and recessed, small S&W logo under the cylinder latch, no trigger stop, 71K029x, standard hammer and trigger, black sights front and rear. I would guess it at late 1970's production. I bought it for leisurely punching paper and so I could get back into reloading .357. I once owned a 2 1/2 inch Mod. 19 but the muzzle blast just made it a chore to shoot so sold that some years back. If this one works out I may consider a 4 incher as a trail and fishing gun. Pictures later with some luck.
Des
Des