Dating jmp marshall amps
How to read the bar code Ignore the bar code on the first line. Note that some models produced from 1979-81 had serial numbers stamped on the front panel (to the left of the power switch).
How to read the serial number (1969-1983)Marshall used a coding system that provided (a) model, (b) serial number, and (c) manufacture date.
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For example: S/L C 12357 S/L would indicate the model Super Lead 100 watt C indicates the year 1971 12357 is the serial number. Starting in 1993 until 1997 Marshall switched over to a new serial number system.
The new system designated the year of manufacture in the first two digits of the number and the week of manufacture in the last two. For example: 93579942: Year of manufacture is 1993 in the 42 Billy Penn's 300guitars Shop located at 1L Executive Drive in Toms River, NJ will bring your guitars and amplifiers back to life!
To avoid confusion with the numerals 1 and 0, Marshall elected to skip the letters I and O.
Also, for reasons not explained, there are no Q-dated amps.
Manufactured in the Marshall factory in Bletchley, England, these two new amps along with the renamed Studio Jubilee form a formidable range that have captured the hearts and imaginations of countless guitarists worldwide.
This system was used until 1992, when a bar code system was introduced.(a) Model - The first part of the serial number grouping determines the model of the chassis. (b) Serial number - The second part of the alphanumeric grouping is the five-digit serial number itself.(c) Manufacture date - The last character determines the date of manufacture.
Since A was used in both 19, Marshall decided that 1971 would start with C.
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Using the information in this section, you can attempt to dial in the possible dates of manufacture more closely than by sheer estimation alone. Yes (read on) | No (scroll down to the seriel nuber section)Marshall began using a nine-digit bar code label beginning in 1992. Marshall amps began featuring aluminum back panels in 1969.