Celestion Since 1956, all Celestion chassis drivers have been stamped with a date code (2 numbers and 2 letters), denoting the exact date of manufacture. The codes are added on the production line and are placed on the speaker’s housing leg or the magnet edge. The following lists provide an accurate record of the date codes used.

1956-1962

1956 AJanuary A
1957 BFebruary B
1958 CMarch C
1959 DApril D
1960 EMay E
1961 FJune F
1962 GJuly G
August H
September I
October J
November K
December L

The datecodes from 1956 to 1962 are written in the form: Day, Month, Year. For example: 15DE = 15th April 1960

1963-1967

1963 HJanuary A
1964 JFebruary B
1965 KMarch C
1966 LApril D
1967 MMay E
June F
July G
August H
September J
October K
November L
December M

Note the loss of the ‘I’ from the month codes. The date codes from 1963 to 1967 are written in the form: Day, Month, Year. For example: 19MK = 19th December 1965

1968-1991

1968 AJanuary A
1969 BFebruary B
1970 CMarch C
1971 DApril D
1972 EMay E
1973 FJune F
1974 GJuly G
1975 HAugust H
1976 JSeptember J
1977 KOctober K
1978 LNovember L
1979 MDecember M
1980 N
1981 P
1982 Q
1983 R
1984 S
1985 T
1986 U
1987 V
1988 W
1989 X
1990 Y
1991 Z/A

The date codes from 1968 to 1991 are written in the form: Month, Year, Day. For example: KH7 = 7th October 1975

1992-2005

1992 BJanuary A
1992 VFebruary B
1993 DMarch C
1995 EApril D
1996 FMay E
1997 GJune F
1998 HJuly G
1999 JAugust H
2000 KSeptember J
2001 LOctober K
2002 MNovember L
2003 NDecember M
2004 P
2005 Q

The date codes from 1992 are written in the form: Day, Month, Year. For example: 29EJ = 29th May 1999

Credit: Celestion.