The Smith experts have pretty much narrowed the production period to 1938-39. I haven't ask for a letter but, to look at it, it seems to have lead a rather quite existance. There is holster wear the muzzle and some minor holster wear on opposit sides of the cylinder. It looks like it sat in a holster indexed to the same chamber for a long time and was not carried around or shot much.
The action is new-tight with positive pre-timing before full hammer stand. Single action trigger pull weights out right beween 3.5 and 4 pounds. Grip Checkering is sharp with no scratches or wear.
I asked the dealer about it and he said " Some old man brought it in."