This one goes into my 'cop gun' collection (a rather wide selection of double action revolvers of the 20th Century).
This one is a Smith & Wesson 1905 Hand Ejector, Third Model, Second Change in caliber .32-20; aka .32 Winchester Centerfire (not to be confused with .32 Winchester Special).
As far as I can tell from my references, it was made circa 1909 (oddly the birth year of my late Honored Father) and seems to be a worn original. Six and one half inch barrel, somewhat dark in the grooves, nickel plated and seems to be not re-plated (markings pretty crisp; screw heads - uh - 'used'). Has factory mother of Pearl grip panels with S&W logo medallions inset. The grips are not only unbroken, they are are unchipped!
The serial number is 49xxx, only five digits. If anyone has better date of manufacture, I would be appreciative.