I am concentrating on the Boston Police Pistol team rather than just Duty guns.
While not S&W I added an extremely rare Colt Woodsman Match Target .22 LR pistol, Boston PD only had 6 of these pistols received in 1939. I now have 3 of them, two are sequentially serial numbered. I also have 3 of the Colt Officers Model Target .38 SP revolvers, ALL Sequentially serial numbered, they only had 10 of these.