C G Conn
Serial Number Year Manufactured
1 1876
700 1877
1700 1878
3000 1879
5000 1880
6000 1881
7000 1882
8000 1883
9000 1884
10,500 1885
12,000 1886
13,000 1887
14,000 1888
16,500 1889
18,000 1890
20,000 1891
22,500 1892
25,000 1893
27,500 1894
29,000 1895
34,000 1896
40,000 1897
46,700 1898
52,000 1899
58,000 1900
66,700 1901
71,000 1902
76,000 1903
82,000 1904
88,000 1905
94,000 1906
100,000 1907
106,000 1908
111,000 1909
116,000 1910
121,000 1911
126,000 1912
130,150 1913
132,400 1914
137,000 1915
142,575 1916
146,600 1917
155,000 1918
165,900 1919
169,500 1920
175,500 1921
190,450 1922
198,475 1923
206,700 1924
219,850 1925
230,900 1926
239,500 1927
252,900 1928
263,200 1929
273,700 1930
280,130 1931
281,360 1932
289,743 1933
294,687 1934
300,690 1935
307,996 1936
315,575 1937
322,650 1938
324,859 1939
327,850 1940
338,500 1941
348,150 1942
354,600 1943
355,500 1944
355,750 1945
355,850 1946
366,650 1947
376,100 1948
383,650 1949
389,600 1950
396,300 1951
393,301 1952
420,057 1953
427,301 1954
500,001 1955
571,850 1956
652002 1957
718,626 1958
779,657 1959
834,200 1960
898,556 1961
949,465 1962
C00501 1963
C73854 1964
E54106 1965
H31247 1966
K35274 1967
L20454 1968
"M" prefix 1969
"N" prefix 1970
"P" prefix 1971
"R" prefix 1972
GA30000 1973
GA40000 1974
GA50000 1975
GA60000 1976
GA70000 1977
GA80000 1978
GA90000 1979
HA00000 1980
HA16500 1981
HA23431 1982
HA33389 1983
HA45522 1984
HA58992 1985
HA68842 1986
HA76618 1987
Starting in 1987, the two-digit prefix number plus 50 will give you the year of manufacture on all Conn products.
During the years from 1965 to 1969 information is more inacurate. There was a fire in the Indiana facility where some information was lost.
In March of 1974 an alpha-numeric system was established where the first character (letter) of a serial number indicated the decade; "G" for the 1970's, "H" for the 1980's, etc. The second character, also a letter, indicates the month of the year; "A" for January, "B" for February, "C" for March, etc. The third character (a number) indicates the number of year within the decade (indicated earlier by the first letter). The fourth character (number) indicates the specific type of instrument: "1" = Cornet, "2" = Trumpet, "3" = Alto Horn, "4" = French Horn, "5" = Mellophone, "6" = Valve Trombone, "7" = Slide Trombone, "8" = Baritone Horn & Euphonium, "9" = Tuba, and "10" = Sousaphone. The remaining four numbers of the serial number indicate the production number of the instrument on a monthly basis.
