The 4" S&W .38/.357 Service Revolver. Clockwise from top left
10-8, 28-2, 581, 686, 10-5, 15-2, 19-4, 19-3, 66-2
I can only confirm that the 581 & the 10-5 ever served as LE guns. I can confirm that neither 19 served. I would not be surprised if the 28-2 & the 686 served due to finish wear when...