I understand the interest in a low s/n. The funny thing is, after studying s/n's and ship dates for many years, it was often a common practice, with any three letter prefix, for S&W to start at the higher numbers and work backwards to the lower numbers.
In other words, it was the higher number s/n's that shipped first. This was not a hard and fast rule written in stone, but it is something frequently seen.
The gun in question, in post #1, is obviously an very early gun. Besides the s/n, it's in an old style two-piece box with a handwritten label. That was common in 1980 and 1981. By early 1982 the one-piece box became standard, and the old style two-piece box faded away and was only used occasionally as inventory was used up.
Plus, the gun has the S&W logo on the right side. Like an N-frame. On L-frames the logo moved back and forth for awhile. The earliest L-frames more likely had the logo on the right side. By 1983/1984 it had pretty much settled on the left side. It's still there today.