1974 - Total production ends. The last known Model 40 to be produced was serial number L9861. According to Smith & Wesson data, total production numbers totaled about 40,000 units from 1952 to 1974.
SERIAL NO. range: - L9861


I just picked Up L9867 which included a letter referencing it as the third to the last, or L9879 as the last in this series.