This is a Model No. 1 Second Issue S&W 22 spur trigger 22-caliber revolver. These were from 1860-1868 and about 117,000 were made. This one has very good mechanical function and a near very good bore with strong rifling and only a very small amount of corrosion. The barrel to frame fit is very tight. Only small traces of blue remain and the serial number is 120764 so it was near the end of production for this model in 1867 or 1868.