This revolver has a serial number on the left side of the frame below the hammer. The lower serial numbers run from 10001 to 10100 and then again 10001 starting at 10200. The first three digits \"100\" and the serial number indicate the manufacture; the next five digits indicate the model number (also known as the \"series number\" or \"SCB\" number); and the last three digits indicate the year of production. In the case of the Win 55 Series, the last three digits are \"14\". These last three digits and the \"14\" can appear on all models. After the \"14\" appears the two digit production number. The L'Garde chambering was introduced as an optional chambering in February, 1996 and is not applied to the Model 10 and Model 21. Only the Blackhawk revolver has the L'Garde chambering. The Smith & Wesson M&P pistols in black finish have the first \"10001\" as the serial number. The Smith & Wesson M&P pistols in black finish have the first \"20001\" as the serial number.
Smith & Wesson introduced an improved hammer-block safety system with the addition of dual manual safety levers on the left side of the frame. The new system, although often referred to as \"hammer-block\" or \"double action\", was actually double action-single action. This system was manufactured for the Model 2000, with minor variations for the Models 3100 and 38 (Model 10 and Model 21).
A change in the M&P mechanic was made in the spring of 1947 to correct the problem of the hammer hitting the cylinder when cylinder was presented to the hammer after the hammer was cocked. Many Victory models had been returned to Smith and Wesson for the problem to be corrected. A serial number on one of the cylinder serials on the hammer is always a zero and is located at the top of the cylinder and across the hammer face.
The Smith & Wesson Model 10 was put into production in November 1947. In fact, once Smith & Wesson returned to manufacturing with this gun, it was the first new model factory for Smith & Wesson in 16 years. The production run was 16 months long, wrapping up in May 1949. 7211a4ac4a