Just to help the next guy that needs a reference, here is what I learned as pertains to model 76 serial numbers. It does not apply to take downs, model 10s, or special editions.
Serial 1080 was in 1987
Serial 1812 was in 1995
Serial 2311 was in 2012
You might wonder, why the hell does it matter? I’ll tell you the biggest why. The Talley Quick-Detach rings that were made by Talley for Dakota were proprietary, they were not the same Talley ring. So to get new Talley Quick Detach Rings from Talley you need to throw the original bases in the trash and buy a new $40 set of bases from Talley and then Talley rings. The bases for Dakota 76 marketed by Talley come in two designs. One design with 6-48 screws and holes, another with 8-40 screws and holes. If your gun was made pre-2005 it gets one type of base, post-2005 another.
So to get Case Colored Low 30mm Dakoat QD rings for my son’s rifle, I had to throw away the existing rings and bases and replace both to Break the proprietary and no-longer-available gotcha. Why Dakota demanded Talley make them proprietary rings instead of standard Talley rings I have no idea.