Re: 2nd gen Saa questions.
I relied on the Blue Book for that info. It says that the Second Generation ended at 73205SA in 1975. Production of the "New Model", or Third Generation, began with 80000SA in early 1976.
To some of us old timers, they are all "post-war" guns and of little interest. But in fact, they now have enough age that they have a collector following separate from the old guns, especially since they are among the few guns of the old type still in production, even with those changes I mentioned, like the cylinder bushing changes.