Serial # K277xxx. 1956?
Slight blue thinning at muzzle from holster wear, and a pin sized finish blemish on the left plate. Other than that, it looks about as new. Internally, looks like it was made yesterday.
Blog post to follow, after I research a while. I might have to actually bbbbbBUY the Smith and Wesson book now.
Of course I have already fired it. Never ask a question that silly again.