Hamilton Production Dates by Serial Number
Hamilton Watch Co, Lancaster, PA

The serial number being referred to is the serial number on the movement (i.e. "guts") of the watch.  

Note: These are approximate dates. Actual dates may vary by years.

1893 - 2,000   
1894 - 5,000  
1895 - 11,500   
1896 - 16,000   
1897 - 27,000  
1898 - 50,000   
1899 - 74,000   
1900 - 104,000   
1901 - 143,000   
1902 - 196,000   
1903 - 260,000   
1904 - 340,000   
1905 - 435,000   
1906 - 500,000  
1907 - 580,000  
1908 - 680,000   
1909 - 750,000   
1910 - 790,000   
1911 - 860,000   
1912 - 940,000   
1913 - 1,000,000   
1914 - 1,100,000  
1915 - 1,200,000 
1916 - 1,300,000
1917 - 1,400,000
1918 - 1,500,000
1919 - 1,600,000
1920 - 1,700,000
1921 - 1,800,000
1922 - 1,900,000
1923 - 2,000,000
1924 - 2,050,000
1925 - 2,100,000
1926 - 2,150,000
1927 - 2,200,000
1928 - 2,250,000
1929 - 2,300,000
1930 - 2,350,000
1931 - 2,400,000
1932 - 2,440,000
1933 - 2,480,000
1934 - 2,520,000
1935 - 2,560,000
1936 - 2,600,000
1937 - 2,900,000
1938 - 3,200,000
1939 - 3,400,000
1940 - 4,000,000
1941 - 4,250,000
1942 - 4,500,000

950B w/ 1st letter S
1941 - S001
1944 - S1,500
1945 - S2,800
1946 - S4,000
1947 - S4,500
1948 - S6,500
1949 - S7,500
1951 - S10,000
1955 - S25,000
1962 - S28,000
1965 - S30,000

950B w/ 1st letters 2B
1941 - 2B001
1942 - 2B400
1943 - 2B800

992B w/ 1st letter C
1940 - C001
1941 - C40,000
1942 - C60,000
1943 - C90,000
1944 - C120,000
1946 - C170,000
1947 - C215,000
1948 - C255,000
1950 - C350,000
1951 - C390,000
1954 - C420,000
1956 - C455,000
1959 - C500,000
1964 - C520,000
1969 - C529,200

3992B - 1943 to 1945

4992B w/ 1st letters 4C
1941 - 4CXXXX
1942 - 4C40,000
1944 - 4C90,000
1950 - 4C120,000
1960 - 4C135,000
1968 - 4C145,000

-Courtesy PocketWatchSite.com