Well, if you put it that way …..

On the other hand, just for the sake of argument, if you look at the development of employee numbers since 1941, there weren‘t likely that many people at S&W who had ever seen a K-frame produced without a hole. And for all the blather about old-time craftsmanship that old guys like to engage in, these weren‘t craftsmen, but industrial workers, not paid to think. The guy who drilled the whole is very unlikely to also be the guy to later plug it. So it seems entirely feasible that at least some of Jack’s 9000 hole-y S-prefix frames were produced before your smart guy yelled stop.