This is a solid shooter grade model 586 from 1981. I'd put the finish at about 90%. Bluing is a little thin at the muzzle. There is also wear on the side plate where the top edge of the stocks rubbed at some point. Timing is good, with some rotational play. There is no push-off. End shake is not excessive. It wears a set of factory smooth target grips which have had a crack repaired and been refinished.

Model 586 (no dash)
AAB serial prefix
Smooth .312 trigger