It's a 6-inch K-frame, pre-model numbers, with a serial number in the 60xxx range.

When might it have rolled off of the factory floor?

Probably refinished (it has a grayish cast to the bluing, and the S&W logo on the sideplate seems a bit less than crisp), but in about 98% condition, it sports checkered grips (a couple of damaged diamonds and a very small chip in one of the grips) and a Wondersight. When is the last time you saw one of them?

Not for sale. I'm sitting on plenty of .32-20 brass and more cast bullets in .312-314 diameter than I'll ever shoot, as well as some 85 grain and 115 grain jacketed. Feed them to this and, except for the 115 grain jacketed and 120 grain cast, to my two Ruger .32 H&R revolvers (a 4-inch SP101 and a small frame Bisley).

Thanks.

The web is your friend, not hard to do. 1948. 32.20 is a fun one.

You have a very nice revolver there, 40x. That's a fun cartridge in one, too. I would love to see a picture of it, not many of them around I would think.