Marshall dating serial number

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Marshall amps began featuring aluminum back panels in 1969. Marshall has used three serial number systems since 1969. Okay, I know you’re all just dying to skip ahead to the serial number tables but try to contain your excitement and read through the article first.A 1957 tweed Vibrolux was reported with a tube chart printed with circuit “5E3” (tweed Deluxe) instead of the correct 5F11 (see photo). Besides, no article in the Dating Fender Amps by Serial Number series would be complete without some interesting information, n’est ce pas? I promise the tables will still be there after you finish reading.Working at FMI – I was able to interview a fellow (who wishes to remain anonymous) who worked at Fender in 1972-73 in the amp department.

They were something to behold, all chatting away while soldering so quickly, it didn't hardly seem like they were looking at the amps.

Non-Schumacher transformers – It’s been universally accepted that Fender only used Schumacher transformers on amps made in the 1960s and 1970s.

These are marked with EIA code “606” which is the company number for Schumacher.

In 1984, the order of the serial number components changed to (a)(c)(b), but the method used to determine the values for (a) and (c) remains the same.

The first part of the serial number grouping determines the model of the chassis.

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