The second generation Smith autos (three digit model numbers) are not particularly special. They made a milion of them and were forced by their holding company (Tompkins) to revise them because of their shortcomings. They were certainly better than the 39/59 but not up to the standards of the market. Most have been relegated to back of the shelf status in gun safes as there are MUCH better guns available today.
They work. They are accurate. Most people do not consider them particularly "pretty". Not much chance of there ever being a collector following. Shoot it. Enjoy it.
In life, strive to take the high road....It offers a better field of fire.
"Robo is right" Fuzzball