I often check the Fugate Firearms site (I believe a member here told me about them) because they sell NIB (or nearly NIB) S&W revolvers all the way back to the 1950's, and other guns. It's a fun site to browse...
They have a 1970's model 40 .38 for sale, it's a hammerless .38 snubby (the grandfather of the model 442 that I carry every day), and the darned thing has a grip safety.
I believe most if not all of the old S&W lemon squeezers had grip safeties, and looking at this gun, made in the 1970's, I have to ask - WHY? Why would a snubby without a hammer need a grip safety, when all of the snubbies at that time, and before, WITH hammers, did not have grip safeties?