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Marshall Date Codes

MARSHALL DATE CODES
Early Marshall through the JCM800 series

July of 1969 Marshall introduced the date coding system. Some of the older amps have an inspection sticker on the top of the chassis and they usually have the day, month and year the amp was made or inspected.

Note: "A" Date Code: The "A" Date Code ran for 18 months (July 1969 - December 1970) so the "B" Code was not used.

1979-1981: Some Marshalls made from 1979 to 1981 have the serial number on the front panel.

SERIAL NUMBER CHART

A 1969
A 1970
C 1971
D 1972
E 1973
F 1974
G 1975
H 1976
J 1977
K 1978 
L 1979
M 1980
N 1981
P 1982
R 1983
S 1984
T 1985
U 1986
V 1987
W 1988
X 1989
Y 1990
Z 1991
Z 1992

 

MODEL CODES (July 1969 December - 1983 roughly)

/A 200 Watt
SL/ 100 Watt Super Lead
SB/ 100 Watt Super Bass
SP/ Super PA
ST/ 100 Watt Tremolo
S/ 50 Watt
T/ 50 Watt Tremolo

 

MORE RECENT MODEL CODES (January 1984 - October 1992 Roughly)

A/ 200 Watt
SL/A 100 Watt Super Lead
SB/A 100 Watt Super Bass
SP/ Super PA
ST/A 100 Watt Tremolo
S/A 50 Watt
T/A 50 Watt Tremolo
RI Reissue

July 1969 - December 1983
EXAMPLE: SL/A 24523 D
SL/A = Model Code
24523 = Serial Number
E = Date Code
This amp would have be a 100 Watt Super Lead 1972

January 1984 - October 1992
EXAMPLE: S/A T 24523
S/A = Model Code
T = Date Code
24523 = Serial Number
This ampwould have be a 50 Watt 1985

 

JCM900's
The JCM900's began using a Bar Code system which consists of 9 digits which are broken down into three sections.

EXAMPLE: 950322589
95 = Year
03 = Month
22589 = 5 digit serial number
This amp would have been made in March 1995.

 

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