All I can tell from your post with certainty is that you have a Model 19, early 1970s manufacture, probably a Model 19-3. To give you an idea of value, we really need more information, including barrel length (measure from the muzzle to the front of the cylinder when it is closed), grip type (factory targets, factory magnas, aftermarket wood or (gulp) rubber), whether there is a capital N stamped on the rear face of the cylinder, markings on the grip frame below the grips (you need to remove the grips for that), especially anything that is market R-N with a date, type of sights (from the serial no, you have adjustable rear sights, but you could have either a Baughmann ramp front sight or a Patridge front sight), whether there is red insert in the front sight, if there is a white outline around the rear sight opening, etc. Photos would be of immense help, as well.