Found this nice Model 29 (no dash) today.
Four inch barrel, "Coke Bottle" grips. It is a "four screw" gun, from 1959. Its got just a little wear here and there, like it was carried a little, but it doesn't look like it was shot very much.
Deep black bluing, that looks like you could dive into it, and a very sweet trigger. I love this style grips. They aren't as fat at the bottom like later S&W grips, and feel more like Gunfighters than Targets.
This one is not something you stumble onto every day

Here's a few quick photos:



