5" S&W M&P from 1936.
Bob
Another outstanding example of a revolver with personality. And, I expect a bit more user friendly in double action, too.
There was a “veteran” on the San Jose CHP Squad, when I was the range master there, who carried a 6” M&P in a clamshell holster while the other officers all had some kind of adjustable sight revolver. Every quarterly qualification day, that old coot could be counted on to out score nearly everyone.