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Superior Music            MARSHALL -  Tube Amplifier
                                   Serial Number, Model & Date
Info for 1969-present

Marshall amps 1969-1992 with a Serial Number:

We do not have serial number information on Marshall Amps before 1969.

The serial number is usually located on the back panel of the chassis but some
amplifiers made between 1979-1980 had them on the front panel.

From July 1969 to December 1983, the date letter was put after the serial number.

From Jan 1984 to October 1992 the model letter first, then the date letter second,
 were before the serial number.

Letters I & O were omitted to avoid confusion with numbers 1 & 0.

Model Code Model Type
A/ or /A 200 Watt
RI Reissue
S/ or S/A 50 Watt
SB/ or SB/A 100 Watt - Super Bass
SL/ or SL/A 100 Watt - Super Lead
SP/ Super PA
ST/ or ST/A 100 Watt - Tremolo
T/ or T/A 50 Watt - Tremolo
Date Code Year
A 1969-70
C 1971
D 1972
E 1973
F 1974
G 1975
H 1976
J 1977
K 1978
L 1979
M 1980
Date Code Year
N 1981
P 1982
R 1983
S 1984
T 1985
U 1986
V 1987
W 1988
X 1989
Y 1990
Z 1991-92

Marshall amps with a Barcode 1993-1996:

The first two numbers are the year, and the last two numbers are the month.

Marshall amps with a Barcode 1997-Present:

In 1997 Marshall changed to the latest dating system which is the easiest to decipher of them all. It is simply the year followed by the week.
1998-35-1234: this tells us that the amp was built in week 35 of 1998