I don't mean this to be a lock/no lock post but I never thought I would own a S&W with a lock. It wasn't necessarily because I object to them and their origins, which I still mildly do but that's another story, but more that there wasn't anything being offered that i couldn't do without.
I just picked up a 431PD which is forcing me to rethink my previous position.
I have today so far I am impressed. The fit and finish are first rate. This seems to me to be the best kept secret in an affordable S&W 32 H&R.
I'm going to have to read up and learn more about these, but for now I am so happy with it that I have now found myself thinking about the Night Guard series, maybe a 2" 44 special.
431PD with it's older cousin 631