Today at a gun show, I purchased a Ruger Flattop Blackhawk with stag grips. I know the factory stag grips add some value to the revolver but I also know that there are no markings or anything to discern whether or not they are actually factory. I'm hoping some of you can take a look at the below pictures and give an opinion on the authenticity of the stag grips. Serial number is in the 6600's. Any information you can provide is appreciated and let me know if you need more pictures.