Your revolver appears to have an aftermarket Parkerized (Sp) finish, that appear to be showing signs of rust on the barrel, sight rib, and front sight. Along with the cost effective rubber grips any collectors’ value is gone. It’s a utilitarian revolver that would make a good truck gun, or something just to knock around with. I’m thinking it would be a $350.00 - $400.00 revolver at best.