Marshall dating serial number

14 Dec

I won’t write the rest because it may confuse you even more. It’s important to note that, for example, a 1959 amp has nothing to do with the The JTM-45 JTM-45 with “block” logo The first Marshall ever made. The front panel has “Presence”, “Bass”, “Middle” and “Treble” controls, as well as 2 volumes and 4 inputs.

It was basically a copy of the 1959 Fender Bassman. In 1965, the plexiglass faceplates were introduced.

Amplifiers from this era must be dated within this time span based on their features, or component manufacturers and codes, including speakers, potentiometers and transformers.

Examples: 1479 1965 JTM 45 5200 1966 JTM 45 SL/ 10584 1967 Model #1959 JMP Super Lead SP/ 20099 1967 Model #1968 JMP Super PA SB/ 10257 1967 Model #1992 JMP Super Bass S/ 10637 1968 JMP S/A 2148 A 1969 JMP More Examples The model number takes the form of four-digits preceded or followed by letter codes describing amplifiers characteristics.

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.

From July of 1969 until September of 1992 the date code system included a letter of the alphabet in the serial number.

Here are the letters with their corresponding years.

For example: S/ 15679 E S/ would indicate the model which is 50 watt 15679 is the serial number E indicates the year 1973 From January 1984 to October 1992 the date code letter was put before the serial number.

Dating a Marshall amplifier can be a daunting task for even the most savvy of suitors — Amp Archives is here to help.

The earliest Marshall amplifiers were made in 1962 and had no model or serial numbers.

The letter B was skipped because the letter A was used for 18 months and the letters I, O and Q were also skipped to avoid any confusion being mistaken for numbers.

The serial number on a Marshall amp is usually located on the back panel of the chassis but some amplifiers made between 19 had the number on the front panel.