There were only about 10,000 made in the early 1980s (approx 1980-83). Other 2nd gen 9mm pistols ran from about 1979-1989 so you most likely see more 459s and 659s. They do look identical to the 459 though.
Thanks. That's a nice looking gun. I am surprised the model wasn't that popular, though Smith & Wesson is known for ending production on models too early...