It's the M&P-Model 10-Model 64, for my vote. I'll add the 64 because it's just a stainless Model 10

S&W's meat and potatoes, standard .38 Special service revolver. Built for hard service, has everything you need for 2-legged predators and nothing you don't. Made for police, military and civilian use, as a basic defensive handgun. How much more "Classic" does it get?

If it has adjustable sights it's already getting too complicated.....