That label says it all. Model 66, Target Stock, Target Hammer, Target Trigger, Red Ramp front sight, White Outline rear sight, product code 102707. That 4304 number is the year (1984) and the 304th day (October 31-Haloween) that the gun was made. If I inherited it, I would keep it, but that's me. If I was selling it and someone offered me $1000, I would take it. Hope that answers your questions, and good luck!
When I said $1000 was a fair price, I was assuming it was unfired or barely fired. That is pretty near the top end for one from that era. Older ones have what is called a pinned barrel and recessed cylinder. Those would probably bring a little more money, but $1000 for a 66-3 is pretty darn goodits unfired