I do not recall exact production numbers and dates, but they are no longer made. The slide was made of Zamak, a kind of pot metal not normally associated with the likes of S&W. They were intended to have a life expectancy of 5000 rounds. Not much in conventional pistols, but alot in pocket gun life expectancy.
I had one, bought new for $185, back in 1998 or so. It shot fine, reliable and accurate to 15 yards or so. Once of my co-workers still carries one for a back up gun. He's happy with it.