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Next, (if applicable) look for the date code on the tube chart.
If your amp dosen’t have a date code, flip the amp upside-down and check the transformers, and speakers for their manufacturer codes.
The following chart, was originally printed in VG magazine, by Gerald Weber.
If you see any data that is not listed here or notice any errors, for 1970’s and earlier Fender amps, please send us an email and we will update the chart.
Fender installed casters on some larger amps and cabs beginning in 72.
The fist Master volume controls were first installed in 72.I turned to the Internet to do some more networking which resulted in a major turn of events as I met two individuals who have become instrumental partners in this project: Greg Huntington and Devin Riebe.Greg is a long time Fender collector who is very knowledgeable not only in the details, but in the circuitry as well.To give an example, a typical Oxford speaker from the ’60s will look something like: 465-217.465 designating the Oxford EIA code, 2 designating the year 1962, and 17 designating the 17th week of ’62.