So if you find pots from late 68 and transformers from early 69 you can be pretty sure your amp is a 1969.Serial Number: There is no information readily available for dating Fender amps by serial number but there are people working on it. Circuit Code: In 1963 Fender stoped using model numbers to identify schematics and began using the model name and an assigned circuit number.Per Blue Book and Fender Consumer Relations Department. By entering this site you declare you read and agreed to its Terms, Rules & Privacy and you understand that your use of the site's content is made at your own risk and responsibility.For more information, please visit this site: Fender Support kcbuck So... The code follows the format: XXXYY ZZ where: XXX = a two or three (possibly four on newer amps) digit number indicating the manufacturer.(see chart below) YY = is a one or two digit code indicating the year.If it’s a one digit year you need to determine the correct decade of the amp some other way.
Remember, many components could have been changed over the years, speakers blow, caps dry out, transformers melt down, and pots wear out.
There are exceptions to this rule like the the Bronco.
Fender installed casters on some larger amps and cabs beginning in 72.
The code is simple, the first two letters are the revision, where AA is the first revision, AB is the second, etc.
The next one or two numbers are the month where January is 1 and December is 12. Example: AB763 = second revision, July, 1963 AA1070 = First revision, October, 1970 Misc Dating Info: Silver face amps with the aluminum trimmed grilles are from 67 or 69.