Found a Model 64-5 For Sale online that is advertised as a Single action only. Did S&W make a SAO M64?; possibly a special order.
The box for the M64 shows a product code 102504, with SN CCY86XX. Just curious and trying to learn. Your responses are appreciated.
Thanks.
Kernel Crittenden, one of our local experts on SKU numbers and product codes, will likely be along to look into your product code.
I will defer to the good Kernel, but I have never heard of a PRODUCTION version of a SAO Model 64. Of course, the factory service department could, and would do almost everything if a customer asked nicely and paid for labor and parts.
And, before everyone jumps in, I said "almost everything." For example, I know that since at least the 1970s they typically would not cut and crown barrels to a different length (at least for most people - well known people, authors and such, yes, but not most people), nor would they refinish (back then) the Model 28 or certain other models (Airweights, maybe). Other than that, however, if it involved parts switching, and similar jobs, they were happy to do it.
Thus, my guess is that ASSUMING THIS WAS DONE AT THE FACTORY (and that is not a safe assumption), it was a one-off for a customer who sent in a standard Model 64.