Question for those that may have expertise with this model. All of the 66-1 revolvers that I have seen in my 13 years of collecting have been pinned and recessed. Today I saw a snub that was recessed but not pinned. Would this be transitional, and if so, could I assume it is fairly rare? The gun also had what appeared to be MOP grips on black backing plates, with larger S&W emblems. S&W logo was gold with black backgrounds. Apologies' it was in a box store, and I could not take a photo of it.